117915917 has 16 divisors (see below), whose sum is σ = 140954880. Its totient is φ = 96446592.

The previous prime is 117915907. The next prime is 117915923. The reversal of 117915917 is 719519711.

It is a cyclic number.

It is not a de Polignac number, because 117915917 - 2¹² = 117911821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117915907) 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 in 15 ways as a sum of consecutive naturals, for example, 113633 + ... + 114665.

It is an arithmetic number, because the mean of its divisors is an integer number (8809680).

Almost surely, 2^117915917 is an apocalyptic number.

It is an amenable number.

117915917 is a deficient number, since it is larger than the sum of its proper divisors (23038963).

117915917 is a wasteful number, since it uses less digits than its factorization.

117915917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772.

The product of its digits is 19845, while the sum is 41.

The square root of 117915917 is about 10858.9095677236. The cubic root of 117915917 is about 490.3702837671.

The spelling of 117915917 in words is "one hundred seventeen million, nine hundred fifteen thousand, nine hundred seventeen".