117830813 has 4 divisors (see below), whose sum is σ = 117854688. Its totient is φ = 117806940.

The previous prime is 117830809. The next prime is 117830821. The reversal of 117830813 is 318038711.

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, and also an emirpimes, since its reverse is a distinct semiprime: 318038711 = 2719 ⋅116969.

It is a cyclic number.

It is not a de Polignac number, because 117830813 - 2² = 117830809 is a prime.

It is a super-3 number, since 3×117830813³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117830813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117830803) 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, 1481 + ... + 15422.

It is an arithmetic number, because the mean of its divisors is an integer number (29463672).

Almost surely, 2^117830813 is an apocalyptic number.

It is an amenable number.

117830813 is a deficient number, since it is larger than the sum of its proper divisors (23875).

117830813 is an equidigital number, since it uses as much as digits as its factorization.

117830813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23874.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 117830813 is about 10854.9902349104. The cubic root of 117830813 is about 490.2522829700.

The spelling of 117830813 in words is "one hundred seventeen million, eight hundred thirty thousand, eight hundred thirteen".