79928413 has 4 divisors (see below), whose sum is σ = 79960608. Its totient is φ = 79896220.

The previous prime is 79928389. The next prime is 79928423. The reversal of 79928413 is 31482997.

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.

It is a cyclic number.

It is not a de Polignac number, because 79928413 - 2²¹ = 77831261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79928413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79928423) 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, 12031 + ... + 17452.

It is an arithmetic number, because the mean of its divisors is an integer number (19990152).

Almost surely, 2^79928413 is an apocalyptic number.

It is an amenable number.

79928413 is a deficient number, since it is larger than the sum of its proper divisors (32195).

79928413 is a wasteful number, since it uses less digits than its factorization.

79928413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32194.

The product of its digits is 108864, while the sum is 43.

The square root of 79928413 is about 8940.2691793928. The cubic root of 79928413 is about 430.7583750543.

The spelling of 79928413 in words is "seventy-nine million, nine hundred twenty-eight thousand, four hundred thirteen".