117873221 has 4 divisors (see below), whose sum is σ = 117951744. Its totient is φ = 117794700.

The previous prime is 117873211. The next prime is 117873241. The reversal of 117873221 is 122378711.

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 a de Polignac number, because none of the positive numbers 2^k-117873221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117873211) 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, 36965 + ... + 40026.

It is an arithmetic number, because the mean of its divisors is an integer number (29487936).

Almost surely, 2^117873221 is an apocalyptic number.

It is an amenable number.

117873221 is a deficient number, since it is larger than the sum of its proper divisors (78523).

117873221 is an equidigital number, since it uses as much as digits as its factorization.

117873221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78522.

The product of its digits is 4704, while the sum is 32.

The square root of 117873221 is about 10856.9434464770. The cubic root of 117873221 is about 490.3110908052.

The spelling of 117873221 in words is "one hundred seventeen million, eight hundred seventy-three thousand, two hundred twenty-one".