Properties of the Number 403

Four Hundred Three

Basics

Value: 402 → 403 → 404

Parity: odd

Prime: No

Previous Prime: 401

Next Prime: 409

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 13 × 31

Divisors: 1, 13, 31, 403

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

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Representations

Binary: 110010011

Octal: 623

Duodecimal: 297

Hexadecimal: 193

Square: 162409

Square Root: 20.074859899884732

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

Heptagonal numbers (or 7-gonal numbers): n*(5·n-3)/2. A566

Binary palindromes: numbers whose binary expansion is palindromic. A6995

Inverse Möbius transform of A003961; a(n) = σ(A003961(n)), where A003961 shifts the prime factorization of n one step towards the larger primes. A3973

Sum of remainders of n mod k, for k = 1, 2, 3, ..., n. A4125

Brilliant numbers: semiprimes (products of two primes, A001358) whose prime factors have the same number of decimal digits. A78972

Generalized heptagonal numbers: m*(5·m - 3)/2, m = 0, +-1, +-2 +-3, ... A85787

Start with 1 and repeatedly reverse the decimal digits and add 4 to get the next term. A117828

a(n) = n*(n+5)/2. A55998

Sum of divisors of square numbers. A65764

Number of compositions of n into pairwise relatively prime parts. A101268