Properties of the Number 697

Six Hundred Ninety-Seven

Basics

Value: 696 → 697 → 698

Parity: odd

Prime: No

Previous Prime: 691

Next Prime: 701

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 17 × 41

Divisors: 1, 17, 41, 697

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

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Representations

Binary: 1010111001

Octal: 1271

Duodecimal: 4A1

Hexadecimal: 2b9

Square: 485809

Square Root: 26.40075756488817

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

Number of fractions in Farey series of order n. A5728

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

Cake numbers: maximal number of pieces resulting from n planar cuts through a cube (or cake): C(n+1,3) + n + 1. A125

Least inverse of A015910: smallest integer k > 0 such that 2^k mod k = n, or 0 if no such k exists. A36236

Coordination sequence for 3D uniform tiling formed by stacking parallel layers of the 4.6.12 2D tiling (cf. A072154). A299258

Numbers k such that 10^2·k+1-7·10^k-1 is prime. A115073

Number of aperiodic rooted trees with n nodes. A301700

Consider all Pythagorean triples (X,X+1,Z) ordered by increasing Z; sequence gives X+1 values. A46090