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Properties of the Number 7641

Seven Thousand Six Hundred Forty-One

Basics

Value: 7640 → 7641 → 7642

Parity: odd

Prime: No

Previous Prime: 7639

Next Prime: 7643

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 3 × 283

Divisors: 1, 3, 9, 27, 283, 849, 2547, 7641

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1110111011001

Octal: 16731

Duodecimal: 4509

Hexadecimal: 1dd9

Square: 58384881

Square Root: 87.41281370600079

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

Numbers m such that there are precisely 13 groups of order m. A292896
Number of integer partitions of n whose maximal anti-runs have distinct minima. A375134
Numbers k such that 5k - 4 is prime. A59613
a(n) = numerator of (ζ(0,2,1/3) - ζ(0,2,n+1/3)), where ζ is the Hurwitz ζ function. A173982
Positive integers of the form (2·m2+1)/11. A179088
Numbers that are the sum of five third powers in exactly eight ways. A345184
n has digits in descending order and n=a+b where a has the digits of n in another order and b has the digits of n in ascending order (perhaps with leading zeros). A55161
Numbers formed by the rightmost decimal digits of nnn that are the same as those of nn^(nn). A369624
Number of 2 X 2 matrices with all terms in {0,1,...,n} and (sum of terms) = determinant. A280588
Numbers that are divisible by the product of their factorial base digits (A208575). A286590