117113581 has 16 divisors (see below), whose sum is σ = 128419200. Its totient is φ = 106153920.

The previous prime is 117113573. The next prime is 117113597. The reversal of 117113581 is 185311711.

It is a cyclic number.

It is not a de Polignac number, because 117113581 - 2³ = 117113573 is a prime.

It is a super-2 number, since 2×117113581² = 27431181709287122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117113501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335395 + ... + 335743.

It is an arithmetic number, because the mean of its divisors is an integer number (8026200).

Almost surely, 2^117113581 is an apocalyptic number.

It is an amenable number.

117113581 is a deficient number, since it is larger than the sum of its proper divisors (11305619).

117113581 is a wasteful number, since it uses less digits than its factorization.

117113581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its digits is 840, while the sum is 28.

The square root of 117113581 is about 10821.9028363777. The cubic root of 117113581 is about 489.2555417354.

The spelling of 117113581 in words is "one hundred seventeen million, one hundred thirteen thousand, five hundred eighty-one".