Properties of the Number -3969

Nine Hundred Sixty-Nine

Basics

Value: -3970 → -3969 → -3968

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 7 ²

Divisors: 1, 3, 7, 9, 21, 27, 49, 63, 81, 147

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -111110000001

Octal: -7601

Duodecimal: -2369

Hexadecimal: -f81

Square: 15752961

Square Root: 63

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Antidiagonal-sums of the array A377038(n,k) = n-th term of k-th differences of squarefree numbers (A005117). A377039

Determinant of the n X n matrix with (i,j)-entry equal to 1 or 0 according as i + j and 4*(i + j)² + 1 are both prime or not. A228561

Determinant of n X n matrix defined by m(i,j)=1 if i²+j² is a prime, m(i,j)=0 otherwise. A71524

Coefficient triangle of numerator polynomials appearing in certain column o.g.f.s related to the H-atom spectrum. A120078

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 5", based on the 5-celled von Neumann neighborhood. A270009

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 7", based on the 5-celled von Neumann neighborhood. A270013

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 73", based on the 5-celled von Neumann neighborhood. A270090

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 89", based on the 5-celled von Neumann neighborhood. A270132

Hankel transform of the ruler function A001511. A334910

Odd squares: a(n) = (2n+1)². Also centered octagonal numbers. A16754