117719879 has 4 divisors (see below), whose sum is σ = 118933584. Its totient is φ = 116506176.

The previous prime is 117719869. The next prime is 117719909. The reversal of 117719879 is 978917711.

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 117719879 - 2⁴ = 117719863 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 (117719869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606707 + ... + 606900.

It is an arithmetic number, because the mean of its divisors is an integer number (29733396).

Almost surely, 2^117719879 is an apocalyptic number.

117719879 is a deficient number, since it is larger than the sum of its proper divisors (1213705).

117719879 is an equidigital number, since it uses as much as digits as its factorization.

117719879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213704.

The product of its digits is 222264, while the sum is 50.

The square root of 117719879 is about 10849.8792159176. The cubic root of 117719879 is about 490.0983823002.

The spelling of 117719879 in words is "one hundred seventeen million, seven hundred nineteen thousand, eight hundred seventy-nine".