79720030213 has 4 divisors (see below), whose sum is σ = 81573984448. Its totient is φ = 77866075980.

The previous prime is 79720030097. The next prime is 79720030309. The reversal of 79720030213 is 31203002797.

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 a de Polignac number, because none of the positive numbers 2^k-79720030213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79720030813) 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, 926977053 + ... + 926977138.

It is an arithmetic number, because the mean of its divisors is an integer number (20393496112).

Almost surely, 2^79720030213 is an apocalyptic number.

It is an amenable number.

79720030213 is a deficient number, since it is larger than the sum of its proper divisors (1853954235).

79720030213 is a wasteful number, since it uses less digits than its factorization.

79720030213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853954234.

The product of its (nonzero) digits is 15876, while the sum is 34.

The spelling of 79720030213 in words is "seventy-nine billion, seven hundred twenty million, thirty thousand, two hundred thirteen".