Properties of the Number 47947

Forty-Seven Thousand Nine Hundred Forty-Seven

Basics

Value: 47946 → 47947 → 47948

Parity: odd

Prime: Yes

Previous Prime: 47939

Next Prime: 47951

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 47947

Divisors: 1, 47947

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1011101101001011

Octal: 135513

Duodecimal: 238B7

Hexadecimal: bb4b

Square: 2298914809

Square Root: 218.96803419677494

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 having only {4, 7, 9} as digits. A261183

T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with each row nonprime and column prime, read as a base 3 number with top and left being the most significant digits. A262109

Primes of the form ∑_k=1..m (m^k mod (m+k)). A156557

a(n) = floor(n^m) where m = ∑_k=1..n (1/k). A67038

Sum of proper divisors minus the number of proper divisors of the number of partitions of n, A000041(n). A152987

Prime powers that are equal to the sum of the first k prime powers (including 1) for some k. A364947

Number of (1+1)X(n+1) 0..2 arrays with each row nonprime and column prime, read as a base 3 number with top and left being the most significant digits. A262110

a(n) is the number of k values for which A023193(k) = n. A47947