79365921 has 16 divisors (see below), whose sum is σ = 109659648. Its totient is φ = 51004800.

The previous prime is 79365887. The next prime is 79365931. The reversal of 79365921 is 12956397.

It is not a de Polignac number, because 79365921 - 2¹⁰ = 79364897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79365931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24615 + ... + 27651.

It is an arithmetic number, because the mean of its divisors is an integer number (6853728).

Almost surely, 2^79365921 is an apocalyptic number.

It is an amenable number.

79365921 is a deficient number, since it is larger than the sum of its proper divisors (30293727).

79365921 is a wasteful number, since it uses less digits than its factorization.

79365921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352.

The product of its digits is 102060, while the sum is 42.

The square root of 79365921 is about 8908.7553002650. The cubic root of 79365921 is about 429.7455155455.

The spelling of 79365921 in words is "seventy-nine million, three hundred sixty-five thousand, nine hundred twenty-one".