117830721 has 16 divisors (see below), whose sum is σ = 162652160. Its totient is φ = 75796560.

The previous prime is 117830719. The next prime is 117830731. The reversal of 117830721 is 127038711.

It is not a de Polignac number, because 117830721 - 2¹ = 117830719 is a prime.

It is a super-2 number, since 2×117830721² = 27768157622759682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (117830731) 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, 33576 + ... + 36918.

It is an arithmetic number, because the mean of its divisors is an integer number (10165760).

Almost surely, 2^117830721 is an apocalyptic number.

It is an amenable number.

117830721 is a deficient number, since it is larger than the sum of its proper divisors (44821439).

117830721 is a wasteful number, since it uses less digits than its factorization.

117830721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3756.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 117830721 is about 10854.9859972273. The cubic root of 117830721 is about 490.2521553768.

The spelling of 117830721 in words is "one hundred seventeen million, eight hundred thirty thousand, seven hundred twenty-one".