Properties of the Number 69991

Sixty-Nine Thousand Nine Hundred Ninety-One

Basics

Value: 69990 → 69991 → 69992

Parity: odd

Prime: Yes

Previous Prime: 69959

Next Prime: 69997

Digit Sum: 34

Digital Root: 7

Palindrome: No

Factorization: 69991

Divisors: 1, 69991

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001000101100111

Octal: 210547

Duodecimal: 34607

Hexadecimal: 11167

Square: 4898740081

Square Root: 264.55812215843986

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

Primes containing 999 as a substring. A167292

Smallest positive real Gaussian prime having a gap size of exactly A128106(n). A128109

Primes p such that the differences between the 5 consecutive primes starting with p are (6,4,2,6). A78962

a(n) = 7·10ⁿ - 9. A86945

Primes of the form 7n² - 9. A201854

Number of ordered triples (w,x,y) with all terms in {-n, ..., -1, 1, ..., n} and 4w + x + y > 0. A211629

Number of (w,x,y,z) with all terms in {0,...,n} and (least gapsize)<2. A212896

Numbers n such that φ(reversal(n)) = reversal(φ(n)). Ignore leading 0's. A69282

Indices of primes in sequence defined by A(0) = 61, A(n) = 10·A(n-1) + 81 for n > 0. A101541

Numbers k such that 7·10^k - 9 is prime. A103048