Properties of the Number 7985

Seven Thousand Nine Hundred Eighty-Five

Basics

Value: 7984 → 7985 → 7986

Parity: odd

Prime: No

Previous Prime: 7963

Next Prime: 7993

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 5 × 1597

Divisors: 1, 5, 1597, 7985

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111100110001

Octal: 17461

Duodecimal: 4755

Hexadecimal: 1f31

Square: 63760225

Square Root: 89.35882720806042

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

Monotonic ordering of set S generated by these rules: if·and y are in S then x² + y² is in S, and 1 is in S. A192476

Fibonacci sequence beginning 0, 5. A22088

Sum of two consecutive squares of Lucas numbers (A001254). A106729

Successive states of the Rule 110 cellular automaton defined by 000, 001, 010, 011, ..., 111 -> 0,1,1,1,0,1,1,0 when started with a single ON cell. A6978

Numerators of A178381(4·n+1)/A178381(4·n). A179131

Main diagonal of A101858. A101863

a(n) = sum of 2^k-1 such that floor(n/prime(k)) is odd. A371906

Number of partitions of n² into distinct squares > 1. A298642

Consecutive states of the linear congruential pseudo-random number generator (625·s + 6571) mod 31104 when started at s=1. A385279

a(n) = ∑_k=0..n 2^k * 3^n-k * binomial(n+1,k) * binomial(n+1,n-k). A387368