117815539 has 2 divisors, whose sum is σ = 117815540. Its totient is φ = 117815538.

The previous prime is 117815471. The next prime is 117815549. The reversal of 117815539 is 935518711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117815539 - 2¹¹ = 117813491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117815549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58907769 + 58907770.

It is an arithmetic number, because the mean of its divisors is an integer number (58907770).

Almost surely, 2^117815539 is an apocalyptic number.

117815539 is a deficient number, since it is larger than the sum of its proper divisors (1).

117815539 is an equidigital number, since it uses as much as digits as its factorization.

117815539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 40.

The square root of 117815539 is about 10854.2866647238. The cubic root of 117815539 is about 490.2310988197.

The spelling of 117815539 in words is "one hundred seventeen million, eight hundred fifteen thousand, five hundred thirty-nine".