117778859 has 16 divisors (see below), whose sum is σ = 130916736. Its totient is φ = 105942760.

The previous prime is 117778841. The next prime is 117778867. The reversal of 117778859 is 958877711.

It is a happy number.

It is not a de Polignac number, because 117778859 - 2⁸ = 117778603 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 117778859.

It is not an unprimeable number, because it can be changed into a prime (117778819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142004 + ... + 142830.

It is an arithmetic number, because the mean of its divisors is an integer number (8182296).

Almost surely, 2^117778859 is an apocalyptic number.

117778859 is a deficient number, since it is larger than the sum of its proper divisors (13137877).

117778859 is an equidigital number, since it uses as much as digits as its factorization.

117778859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 945 counting only the distinct ones).

The product of its digits is 987840, while the sum is 53.

The square root of 117778859 is about 10852.5968781670. The cubic root of 117778859 is about 490.1802183126.

The spelling of 117778859 in words is "one hundred seventeen million, seven hundred seventy-eight thousand, eight hundred fifty-nine".