79391515223 has 2 divisors, whose sum is σ = 79391515224. Its totient is φ = 79391515222.

The previous prime is 79391515211. The next prime is 79391515249. The reversal of 79391515223 is 32251519397.

It is a weak prime.

It is an emirp because it is prime and its reverse (32251519397) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79391515223 - 2³⁴ = 62211646039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79391515823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39695757611 + 39695757612.

It is an arithmetic number, because the mean of its divisors is an integer number (39695757612).

Almost surely, 2^79391515223 is an apocalyptic number.

79391515223 is a deficient number, since it is larger than the sum of its proper divisors (1).

79391515223 is an equidigital number, since it uses as much as digits as its factorization.

79391515223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 510300, while the sum is 47.

The spelling of 79391515223 in words is "seventy-nine billion, three hundred ninety-one million, five hundred fifteen thousand, two hundred twenty-three".