117831793 has 4 divisors (see below), whose sum is σ = 118612288. Its totient is φ = 117051300.

The previous prime is 117831781. The next prime is 117831799. The reversal of 117831793 is 397138711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 117831793 - 2⁹ = 117831281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117831799) 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, 390021 + ... + 390322.

It is an arithmetic number, because the mean of its divisors is an integer number (29653072).

Almost surely, 2^117831793 is an apocalyptic number.

It is an amenable number.

117831793 is a deficient number, since it is larger than the sum of its proper divisors (780495).

117831793 is an equidigital number, since it uses as much as digits as its factorization.

117831793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780494.

The product of its digits is 31752, while the sum is 40.

The square root of 117831793 is about 10855.0353753454. The cubic root of 117831793 is about 490.2536421106.

The spelling of 117831793 in words is "one hundred seventeen million, eight hundred thirty-one thousand, seven hundred ninety-three".