117278879 has 4 divisors (see below), whose sum is σ = 117693576. Its totient is φ = 116864184.

The previous prime is 117278873. The next prime is 117278891. The reversal of 117278879 is 978872711.

It is a happy number.

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 117278879 - 2²⁴ = 100501663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117278873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206924 + ... + 207489.

It is an arithmetic number, because the mean of its divisors is an integer number (29423394).

Almost surely, 2^117278879 is an apocalyptic number.

117278879 is a deficient number, since it is larger than the sum of its proper divisors (414697).

117278879 is an equidigital number, since it uses as much as digits as its factorization.

117278879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414696.

The product of its digits is 395136, while the sum is 50.

The square root of 117278879 is about 10829.5373400714. The cubic root of 117278879 is about 489.4856173671.

The spelling of 117278879 in words is "one hundred seventeen million, two hundred seventy-eight thousand, eight hundred seventy-nine".