117775657 has 4 divisors (see below), whose sum is σ = 120648276. Its totient is φ = 114903040.

The previous prime is 117775633. The next prime is 117775687. The reversal of 117775657 is 756577711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36433296 + 81342361 = 6036^2 + 9019^2 .

It is a cyclic number.

It is not a de Polignac number, because 117775657 - 2⁷ = 117775529 is a prime.

It is a super-2 number, since 2×117775657² = 27742210763563298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117775607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436248 + ... + 1436329.

It is an arithmetic number, because the mean of its divisors is an integer number (30162069).

Almost surely, 2^117775657 is an apocalyptic number.

It is an amenable number.

117775657 is a deficient number, since it is larger than the sum of its proper divisors (2872619).

117775657 is an equidigital number, since it uses as much as digits as its factorization.

117775657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872618.

The product of its digits is 360150, while the sum is 46.

The square root of 117775657 is about 10852.4493548692. The cubic root of 117775657 is about 490.1757761705.

The spelling of 117775657 in words is "one hundred seventeen million, seven hundred seventy-five thousand, six hundred fifty-seven".