Properties of the Number 369

Three Hundred Sixty-Nine

Basics

Value: 368 → 369 → 370

Parity: odd

Prime: No

Previous Prime: 367

Next Prime: 373

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 41

Divisors: 1, 3, 9, 41, 123, 369

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101110001

Octal: 561

Duodecimal: 269

Hexadecimal: 171

Square: 136161

Square Root: 19.209372712298546

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

Number of free polyominoes (or square animals) with n cells. A105

a(n) = n*(n² + 1)/2. A6003

Odd numbers of the form p^1+4k * r², where p is prime of the form 1+4m, r > 1, and gcd(p,r) = 1. (Euler's criteria for odd perfect numbers). A228058

Number of sum-free subsets of {1, ..., n}. A7865

Binary irreducible polynomials (primes in the ring GF(2)[X]), evaluated at X=2. A14580

Number of flat partitions of n: partitions {a_i} with each |a_i - a_i-1| <= 1. A34296

Multiples of 9: a(n) = 9·n. A8591

Number of "ON" cells at n-th stage in the "Ulam-Warburton" two-dimensional cellular automaton. A147562

Numbers which are the product of a prime and the square of a different prime (p² * q). A54753

Sequence and first differences (A030124) together list all positive numbers exactly once. A5228