117909923 has 2 divisors, whose sum is σ = 117909924. Its totient is φ = 117909922.

The previous prime is 117909901. The next prime is 117909931. The reversal of 117909923 is 329909711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117909923 - 2²⁶ = 50801059 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (117909823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58954961 + 58954962.

It is an arithmetic number, because the mean of its divisors is an integer number (58954962).

Almost surely, 2^117909923 is an apocalyptic number.

117909923 is a deficient number, since it is larger than the sum of its proper divisors (1).

117909923 is an equidigital number, since it uses as much as digits as its factorization.

117909923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 117909923 is about 10858.6335696532. The cubic root of 117909923 is about 490.3619746562.

The spelling of 117909923 in words is "one hundred seventeen million, nine hundred nine thousand, nine hundred twenty-three".