117625721 has 4 divisors (see below), whose sum is σ = 117648000. Its totient is φ = 117603444.

The previous prime is 117625681. The next prime is 117625727. The reversal of 117625721 is 127526711.

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 117625721 - 2¹⁰ = 117624697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117625727) 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, 1760 + ... + 15438.

It is an arithmetic number, because the mean of its divisors is an integer number (29412000).

Almost surely, 2^117625721 is an apocalyptic number.

It is an amenable number.

117625721 is a deficient number, since it is larger than the sum of its proper divisors (22279).

117625721 is an equidigital number, since it uses as much as digits as its factorization.

117625721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22278.

The product of its digits is 5880, while the sum is 32.

The square root of 117625721 is about 10845.5392212651. The cubic root of 117625721 is about 489.9676793898.

The spelling of 117625721 in words is "one hundred seventeen million, six hundred twenty-five thousand, seven hundred twenty-one".