117866879 has 4 divisors (see below), whose sum is σ = 126933576. Its totient is φ = 108800184.

The previous prime is 117866851. The next prime is 117866891. The reversal of 117866879 is 978668711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978668711 = 317 ⋅3087283.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117866879 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 117866879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117866809) 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, 4533329 + ... + 4533354.

It is an arithmetic number, because the mean of its divisors is an integer number (31733394).

Almost surely, 2^117866879 is an apocalyptic number.

117866879 is a deficient number, since it is larger than the sum of its proper divisors (9066697).

117866879 is an equidigital number, since it uses as much as digits as its factorization.

117866879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9066696.

The product of its digits is 1016064, while the sum is 53.

The square root of 117866879 is about 10856.6513713944. The cubic root of 117866879 is about 490.3022971519.

The spelling of 117866879 in words is "one hundred seventeen million, eight hundred sixty-six thousand, eight hundred seventy-nine".