Properties of the Number 26979

Twenty-Six Thousand Nine Hundred Seventy-Nine

Basics

Value: 26978 → 26979 → 26980

Parity: odd

Prime: No

Previous Prime: 26959

Next Prime: 26981

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 17 × 23 ²

Divisors: 1, 3, 17, 23, 51, 69, 391, 529, 1173, 1587

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110100101100011

Octal: 64543

Duodecimal: 13743

Hexadecimal: 6963

Square: 727866441

Square Root: 164.25285385648556

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 alternating compositions, i.e., compositions with alternating increases and decreases, starting with either an increase or a decrease. A25047

Number of alternating compositions of n, including twins (x,x). A344604

Poincaré series for invariant polynomial functions on the space of binary forms of degree 9. A293934

Integers k such that nextprime(k⁵) - prevprime(k⁵) = 4. A90123

a(n) = 16·n² + 2·n + 1. A204675

a(n) = n²*(2·n + 5). A163683

Indices of primes in sequence defined by A(0) = 49, A(n) = 10·A(n-1) - 31 for n > 0. A101728

Let prime(0) = 1 and f(n) = product prime(d), where d ranges over all the decimal digits of n. The sequence gives numbers n such that f(n) == 0 (mod n). A113735

Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1111-0010-0010 pattern in any orientation. A147176

Integers of the form A164577(k)/3. A164619