117778051 has 4 divisors (see below), whose sum is σ = 117830704. Its totient is φ = 117725400.

The previous prime is 117778013. The next prime is 117778069. The reversal of 117778051 is 150877711.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150877711 = 1439 ⋅104849.

It is a cyclic number.

It is not a de Polignac number, because 117778051 - 2²³ = 109389443 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 117778051.

It is not an unprimeable number, because it can be changed into a prime (117778081) 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, 22815 + ... + 27496.

It is an arithmetic number, because the mean of its divisors is an integer number (29457676).

Almost surely, 2^117778051 is an apocalyptic number.

117778051 is a deficient number, since it is larger than the sum of its proper divisors (52653).

117778051 is an equidigital number, since it uses as much as digits as its factorization.

117778051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52652.

The product of its (nonzero) digits is 13720, while the sum is 37.

The square root of 117778051 is about 10852.5596519899. The cubic root of 117778051 is about 490.1790973799.

The spelling of 117778051 in words is "one hundred seventeen million, seven hundred seventy-eight thousand, fifty-one".