117679521 has 16 divisors (see below), whose sum is σ = 165396800. Its totient is φ = 74219328.

The previous prime is 117679517. The next prime is 117679609. The reversal of 117679521 is 125976711.

It is not a de Polignac number, because 117679521 - 2² = 117679517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117679521.

It is not an unprimeable number, because it can be changed into a prime (117679501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69675 + ... + 71343.

It is an arithmetic number, because the mean of its divisors is an integer number (10337300).

Almost surely, 2^117679521 is an apocalyptic number.

It is an amenable number.

117679521 is a deficient number, since it is larger than the sum of its proper divisors (47717279).

117679521 is a wasteful number, since it uses less digits than its factorization.

117679521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2928.

The product of its digits is 26460, while the sum is 39.

The square root of 117679521 is about 10848.0192201157. The cubic root of 117679521 is about 490.0423689589.

The spelling of 117679521 in words is "one hundred seventeen million, six hundred seventy-nine thousand, five hundred twenty-one".