117615538 has 4 divisors (see below), whose sum is σ = 176423310. Its totient is φ = 58807768.

The previous prime is 117615521. The next prime is 117615539. The reversal of 117615538 is 835516711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 111450249 + 6165289 = 10557^2 + 2483^2 .

It is a junction number, because it is equal to n+sod(n) for n = 117615497 and 117615506.

It is not an unprimeable number, because it can be changed into a prime (117615539) 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, 29403883 + ... + 29403886.

Almost surely, 2^117615538 is an apocalyptic number.

117615538 is a deficient number, since it is larger than the sum of its proper divisors (58807772).

117615538 is an equidigital number, since it uses as much as digits as its factorization.

117615538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58807771.

The product of its digits is 25200, while the sum is 37.

The square root of 117615538 is about 10845.0697554234. The cubic root of 117615538 is about 489.9535399515.

The spelling of 117615538 in words is "one hundred seventeen million, six hundred fifteen thousand, five hundred thirty-eight".