117915923 has 2 divisors, whose sum is σ = 117915924. Its totient is φ = 117915922.

The previous prime is 117915907. The next prime is 117915947. The reversal of 117915923 is 329519711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117915923 - 2⁴ = 117915907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (117915983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58957961 + 58957962.

It is an arithmetic number, because the mean of its divisors is an integer number (58957962).

Almost surely, 2^117915923 is an apocalyptic number.

117915923 is a deficient number, since it is larger than the sum of its proper divisors (1).

117915923 is an equidigital number, since it uses as much as digits as its factorization.

117915923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 38.

The square root of 117915923 is about 10858.9098439945. The cubic root of 117915923 is about 490.3702920844.

The spelling of 117915923 in words is "one hundred seventeen million, nine hundred fifteen thousand, nine hundred twenty-three".