79932121 has 4 divisors (see below), whose sum is σ = 80944000. Its totient is φ = 78920244.

The previous prime is 79932077. The next prime is 79932157. The reversal of 79932121 is 12123997.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12123997 = 139 ⋅87223.

It is a cyclic number.

It is not a de Polignac number, because 79932121 - 2¹³ = 79923929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79932161) 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, 505821 + ... + 505978.

It is an arithmetic number, because the mean of its divisors is an integer number (20236000).

Almost surely, 2^79932121 is an apocalyptic number.

It is an amenable number.

79932121 is a deficient number, since it is larger than the sum of its proper divisors (1011879).

79932121 is a wasteful number, since it uses less digits than its factorization.

79932121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011878.

The product of its digits is 6804, while the sum is 34.

The square root of 79932121 is about 8940.4765532940. The cubic root of 79932121 is about 430.7650361289.

The spelling of 79932121 in words is "seventy-nine million, nine hundred thirty-two thousand, one hundred twenty-one".