Properties of the Number -3639

Six Hundred Thirty-Nine

Basics

Value: -3640 → -3639 → -3638

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 1213

Divisors: 1, 3, 1213, 3639

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111000110111

Octal: -7067

Duodecimal: -2133

Hexadecimal: -e37

Square: 13242321

Square Root: 60.32412452742269

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

Triangle T(n, k, q) = (1-qⁿ)*( binomial(n, k) - 1 ) + 1, with q = 3, read by rows. A174719

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 481", based on the 5-celled von Neumann neighborhood. A272458

Partial sums of primes, if 1 is regarded as a prime (as it was until quite recently, see A008578). A14284

Number of integer partitions of n such that (maximum) <= 2*(median). A361848

Iccanobirt prime indices (15 of 15): Indices of prime numbers in A102125. A102145

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A253495

a(n) = 3·n² - n - 1. A144390

Integers n such that the 'Reverse and Add!' trajectory of n joins the trajectory of 111. A70798

Number of four-prime Carmichael numbers less than 10ⁿ. A174612

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically. A253456