117707857 has 4 divisors (see below), whose sum is σ = 119637556. Its totient is φ = 115778160.

The previous prime is 117707833. The next prime is 117707879. The reversal of 117707857 is 758707711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 758707711 = 1759 ⋅431329.

It can be written as a sum of positive squares in 2 ways, for example, as 4157521 + 113550336 = 2039^2 + 10656^2 .

It is a cyclic number.

It is not a de Polignac number, because 117707857 - 2¹⁹ = 117183569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117717857) 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, 964758 + ... + 964879.

It is an arithmetic number, because the mean of its divisors is an integer number (29909389).

Almost surely, 2^117707857 is an apocalyptic number.

It is an amenable number.

117707857 is a deficient number, since it is larger than the sum of its proper divisors (1929699).

117707857 is an equidigital number, since it uses as much as digits as its factorization.

117707857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929698.

The product of its (nonzero) digits is 96040, while the sum is 43.

The square root of 117707857 is about 10849.3251863883. The cubic root of 117707857 is about 490.0816981644.

The spelling of 117707857 in words is "one hundred seventeen million, seven hundred seven thousand, eight hundred fifty-seven".