117539979 has 4 divisors (see below), whose sum is σ = 156719976. Its totient is φ = 78359984.

The previous prime is 117539971. The next prime is 117539993. The reversal of 117539979 is 979935711.

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

It is a cyclic number.

It is not a de Polignac number, because 117539979 - 2³ = 117539971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117539971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19589994 + ... + 19589999.

It is an arithmetic number, because the mean of its divisors is an integer number (39179994).

Almost surely, 2^117539979 is an apocalyptic number.

117539979 is a deficient number, since it is larger than the sum of its proper divisors (39179997).

117539979 is an equidigital number, since it uses as much as digits as its factorization.

117539979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39179996.

The product of its digits is 535815, while the sum is 51.

The square root of 117539979 is about 10841.5856312626. The cubic root of 117539979 is about 489.8485982332.

The spelling of 117539979 in words is "one hundred seventeen million, five hundred thirty-nine thousand, nine hundred seventy-nine".