Properties of the Number 869

Eight Hundred Sixty-Nine

Basics

Value: 868 → 869 → 870

Parity: odd

Prime: No

Previous Prime: 863

Next Prime: 877

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 11 × 79

Divisors: 1, 11, 79, 869

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1101100101

Octal: 1545

Duodecimal: 605

Hexadecimal: 365

Square: 755161

Square Root: 29.478805945967352

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

a(n) = n + (n+1)². A28387

Number of ways to choose a strict partition of each part of a strict partition of n. A279785

Number of different products of partitions of n; number of partitions of n into prime parts (1 included); number of distinct orders of Abelian subgroups of symmetric group S_n. A34891

List of codewords in binary lexicode with Hamming distance 4 written as decimal numbers. A75928

Square array, read by antidiagonals, where row n equals the crystal ball sequence for the A_n lattice. A108625

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

a(0) = 0. For n > 0, smallest non-palindromic number k such that the smallest palindrome in the Reverse and Add! trajectory of k is reached after exactly n iterations. A23109

Number of strict integer partitions of n whose product of parts is a multiple of n. A379733

Moebius transform of A064987, n*σ(n). A69097

Number of distinct resistances that can be produced from a circuit of n equal resistors using only series and parallel combinations. A48211