79424521 has 12 divisors (see below), whose sum is σ = 87858736. Its totient is φ = 71743320.

The previous prime is 79424519. The next prime is 79424531. The reversal of 79424521 is 12542497.

It is not a de Polignac number, because 79424521 - 2¹ = 79424519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79424531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17710 + ... + 21736.

Almost surely, 2^79424521 is an apocalyptic number.

It is an amenable number.

79424521 is a deficient number, since it is larger than the sum of its proper divisors (8434215).

79424521 is a wasteful number, since it uses less digits than its factorization.

79424521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212 (or 4201 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 79424521 is about 8912.0435928018. The cubic root of 79424521 is about 429.8512573695.

The spelling of 79424521 in words is "seventy-nine million, four hundred twenty-four thousand, five hundred twenty-one".