79090121 has 8 divisors (see below), whose sum is σ = 86405184. Its totient is φ = 71795920.

The previous prime is 79090111. The next prime is 79090129. The reversal of 79090121 is 12109097.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79090121 - 2⁶ = 79090057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79090129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3335 + ... + 13011.

It is an arithmetic number, because the mean of its divisors is an integer number (10800648).

Almost surely, 2^79090121 is an apocalyptic number.

It is an amenable number.

79090121 is a deficient number, since it is larger than the sum of its proper divisors (7315063).

79090121 is a wasteful number, since it uses less digits than its factorization.

79090121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10431.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 79090121 is about 8893.2626746318. The cubic root of 79090121 is about 429.2471430738.

The spelling of 79090121 in words is "seventy-nine million, ninety thousand, one hundred twenty-one".