Properties of the Number 3639

Three Thousand Six Hundred Thirty-Nine

Basics

Value: 3638 → 3639 → 3640

Parity: odd

Prime: No

Previous Prime: 3637

Next Prime: 3643

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

Today's Target

2196 Try Today's Challenge

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

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

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each row and column divisible by 5, read as a binary number with top and left being the most significant bits. A262274

Numbers that are the sum of ten fourth powers in four or more ways. A345597