117778825 has 12 divisors (see below), whose sum is σ = 147164688. Its totient is φ = 93501200.

The previous prime is 117778819. The next prime is 117778841. The reversal of 117778825 is 528877711.

It is not a de Polignac number, because 117778825 - 2⁹ = 117778313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 14707 + ... + 21256.

It is an arithmetic number, because the mean of its divisors is an integer number (12263724).

Almost surely, 2^117778825 is an apocalyptic number.

It is an amenable number.

117778825 is a deficient number, since it is larger than the sum of its proper divisors (29385863).

117778825 is a wasteful number, since it uses less digits than its factorization.

117778825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36104 (or 36099 counting only the distinct ones).

The product of its digits is 219520, while the sum is 46.

The square root of 117778825 is about 10852.5953117215. The cubic root of 117778825 is about 490.1801711447.

It can be divided in two parts, 11777 and 8825, that added together give a palindrome (20602).

The spelling of 117778825 in words is "one hundred seventeen million, seven hundred seventy-eight thousand, eight hundred twenty-five".