79975321 has 4 divisors (see below), whose sum is σ = 80030592. Its totient is φ = 79920052.

The previous prime is 79975309. The next prime is 79975339. The reversal of 79975321 is 12357997.

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: 12357997 = 17 ⋅726941.

It is a cyclic number.

It is not a de Polignac number, because 79975321 - 2⁷ = 79975193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79975391) 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, 25405 + ... + 28378.

It is an arithmetic number, because the mean of its divisors is an integer number (20007648).

Almost surely, 2^79975321 is an apocalyptic number.

It is an amenable number.

79975321 is a deficient number, since it is larger than the sum of its proper divisors (55271).

79975321 is a wasteful number, since it uses less digits than its factorization.

79975321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55270.

The product of its digits is 119070, while the sum is 43.

The square root of 79975321 is about 8942.8922055451. The cubic root of 79975321 is about 430.8426257047.

The spelling of 79975321 in words is "seventy-nine million, nine hundred seventy-five thousand, three hundred twenty-one".