Properties of the Number 61938

Sixty-One Thousand Nine Hundred Thirty-Eight

Basics

Value: 61937 → 61938 → 61939

Parity: even

Prime: No

Previous Prime: 61933

Next Prime: 61949

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 31 × 37

Divisors: 1, 2, 3, 6, 9, 18, 27, 31, 37, 54

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111000111110010

Octal: 170762

Duodecimal: 2BA16

Hexadecimal: f1f2

Square: 3836315844

Square Root: 248.87346182347366

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 primes between n·10⁶ and (n+1)*10⁶. A38826

Numbers k such that the k-th triangular number contains only digits {1,8,9}. A119151

a(n) is the smallest k > 0 such that the first n multiples of k have the same sum of digits, but (n+1)k has a different one. a(n)=0 if no such k exists. A238088

a(n) = n*(4·n²+5·n-3)/2. A126335

Number of primes between 10ⁿ and 10ⁿ+10^n-1. A131043

a(n) is the smallest even k >= 2 such that the first n multiples of k have the same sum of digits, but (n + 1)*k has a different one. a(n) = 0 if no such k exists. A237994

Triangle read by rows: T(n,k) is the number of primes in the half-open interval [10ⁿ, 10ⁿ + 10^k), n >= 1, 1 <= k <= n. A323744

a(n) = 8ⁿ - 2ⁿ. A248217

Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 9 (most significant digit on right). A61938

a(n) = A342068(10ⁿ). A342852