Properties of the Number 26989

Twenty-Six Thousand Nine Hundred Eighty-Nine

Basics

Value: 26988 → 26989 → 26990

Parity: odd

Prime: No

Previous Prime: 26987

Next Prime: 26993

Digit Sum: 34

Digital Root: 7

Palindrome: No

Factorization: 137 × 197

Divisors: 1, 137, 197, 26989

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110100101101101

Octal: 64555

Duodecimal: 13751

Hexadecimal: 696d

Square: 728406121

Square Root: 164.28329190760695

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

Semiprimes whose prime factors are of equal binary length and which differ from each other in exactly three bit positions. A261075

a(n) = ∑_k=0..n binomial(n+k,n-k) * Fibonacci(k+1). A389699

Integers k such that 10^k+37 is a prime number. A135109

Primes p such that A001175(p) = 2*(p+1)/7. A308785

a(n) = ∑_k=0..n-3 T(n,k) * T(n,k+3), with T given by A026681. A26989