117670581 has 12 divisors (see below), whose sum is σ = 194249952. Its totient is φ = 67240296.

The previous prime is 117670577. The next prime is 117670601. The reversal of 117670581 is 185076711.

It is a happy number.

117670581 is a `hidden beast` number, since 1 + 1 + 7 + 6 + 70 + 581 = 666.

It is not a de Polignac number, because 117670581 - 2² = 117670577 is a prime.

It is a super-2 number, since 2×117670581² = 27692731265755122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117670541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 933831 + ... + 933956.

It is an arithmetic number, because the mean of its divisors is an integer number (16187496).

Almost surely, 2^117670581 is an apocalyptic number.

It is an amenable number.

117670581 is a deficient number, since it is larger than the sum of its proper divisors (76579371).

117670581 is a wasteful number, since it uses less digits than its factorization.

117670581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867800 (or 1867797 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 36.

The square root of 117670581 is about 10847.6071554975. The cubic root of 117670581 is about 490.0299592955.

The spelling of 117670581 in words is "one hundred seventeen million, six hundred seventy thousand, five hundred eighty-one".