117375721 has 4 divisors (see below), whose sum is σ = 119365200. Its totient is φ = 115386244.

The previous prime is 117375707. The next prime is 117375733. The reversal of 117375721 is 127573711.

It is a happy number.

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 117375721 - 2¹⁹ = 116851433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117379721) 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, 994651 + ... + 994768.

It is an arithmetic number, because the mean of its divisors is an integer number (29841300).

Almost surely, 2^117375721 is an apocalyptic number.

It is an amenable number.

117375721 is a deficient number, since it is larger than the sum of its proper divisors (1989479).

117375721 is an equidigital number, since it uses as much as digits as its factorization.

117375721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989478.

The product of its digits is 10290, while the sum is 34.

The square root of 117375721 is about 10834.0076149133. The cubic root of 117375721 is about 489.6203097774.

The spelling of 117375721 in words is "one hundred seventeen million, three hundred seventy-five thousand, seven hundred twenty-one".