117667621 has 4 divisors (see below), whose sum is σ = 117731232. Its totient is φ = 117604012.

The previous prime is 117667607. The next prime is 117667633. The reversal of 117667621 is 126766711.

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 117667621 - 2²⁵ = 84113189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117667681) 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, 28945 + ... + 32758.

It is an arithmetic number, because the mean of its divisors is an integer number (29432808).

Almost surely, 2^117667621 is an apocalyptic number.

It is an amenable number.

117667621 is a deficient number, since it is larger than the sum of its proper divisors (63611).

117667621 is an equidigital number, since it uses as much as digits as its factorization.

117667621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63610.

The product of its digits is 21168, while the sum is 37.

The square root of 117667621 is about 10847.4707190202. The cubic root of 117667621 is about 490.0258503647.

The spelling of 117667621 in words is "one hundred seventeen million, six hundred sixty-seven thousand, six hundred twenty-one".