Properties of the Number 23989

Twenty-Three Thousand Nine Hundred Eighty-Nine

Basics

Value: 23988 → 23989 → 23990

Parity: odd

Prime: No

Previous Prime: 23981

Next Prime: 23993

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 7 × 23 × 149

Divisors: 1, 7, 23, 149, 161, 1043, 3427, 23989

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101110110110101

Octal: 56665

Duodecimal: 11A71

Hexadecimal: 5db5

Square: 575472121

Square Root: 154.88382743204662

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

Riordan array (1/(1 + 5·x + x²), x/(1 + 5·x + x²))^-1; inverse of Riordan array A123967. A125906

MM-numbers of labeled graphs with loops spanning an initial interval of positive integers. A320461

Numbers k such that k, k+1, k+2 and k+3 have the same number of divisors. A6601

Sum of next n composite numbers. A72475

Numbers that appear exactly five times in A101402. (Also indices of fives in A101403.). A129117

Starting positions of strings of three 9's in the decimal expansion of π. A83642

Composite numbers k such that σ(k + σ(k)) = 2*σ(k). A246858

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n) - 1, where a(0) = 3, a(1) = 4, b(0) = 1, b(1) = 2, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences. A295962

Number of (n+2) X 3 binary arrays with each 3 X 3 subblock having rows and columns in lexicographically nondecreasing order. A184540

Record values in A356640. A356642