117707657 has 4 divisors (see below), whose sum is σ = 118921236. Its totient is φ = 116494080.

The previous prime is 117707633. The next prime is 117707669. The reversal of 117707657 is 756707711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 756707711 = 373 ⋅2028707.

It can be written as a sum of positive squares in 2 ways, for example, as 93392896 + 24314761 = 9664^2 + 4931^2 .

It is a cyclic number.

It is not a de Polignac number, because 117707657 - 2⁶ = 117707593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117707617) 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, 606644 + ... + 606837.

It is an arithmetic number, because the mean of its divisors is an integer number (29730309).

Almost surely, 2^117707657 is an apocalyptic number.

It is an amenable number.

117707657 is a deficient number, since it is larger than the sum of its proper divisors (1213579).

117707657 is an equidigital number, since it uses as much as digits as its factorization.

117707657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213578.

The product of its (nonzero) digits is 72030, while the sum is 41.

The square root of 117707657 is about 10849.3159692213. The cubic root of 117707657 is about 490.0814205947.

The spelling of 117707657 in words is "one hundred seventeen million, seven hundred seven thousand, six hundred fifty-seven".