Properties of the Number 7931

Seven Thousand Nine Hundred Thirty-One

Basics

Value: 7930 → 7931 → 7932

Parity: odd

Prime: No

Previous Prime: 7927

Next Prime: 7933

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 × 11 × 103

Divisors: 1, 7, 11, 77, 103, 721, 1133, 7931

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111011111011

Octal: 17373

Duodecimal: 470B

Hexadecimal: 1efb

Square: 62900761

Square Root: 89.05616205518852

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

Heptagonal (or 7-gonal) pyramidal numbers: a(n) = n*(n+1)*(5·n-2)/6. A2413

Total number of positive integers below 10ⁿ requiring exactly 5 positive biquadrates in their representation as sum of biquadrates. A186655

Position of rightmost 0 (including leading 0) in 2ⁿ increases. A31142

Reversion of y - y² - y⁵. A63021

Maximal sum of inverse squares of the singular values of triangular anti-Hadamard matrices of order n. A5313

Number of symmetry classes of 3 X 3 magilatin squares with positive values and magic sum n. A173730

Sum of squares of first n positive integers congruent to 1 mod 3. A24215

Numbers such that the digital sums in bases 2, 3, 5 and 7 all are equal. A135127

Natural numbers n that have the property that starting from k = n, the fixed point of the map k -> floor(tan(k)) is strictly positive, while the smallest number encountered during the iteration is strictly negative. A258202

Odd composite integers m such that A004187(m-J(m,45)) == 0 (mod m) and gcd(m,45)=1, where J(m,45) is the Jacobi symbol. A340099