79680973 has 2 divisors, whose sum is σ = 79680974. Its totient is φ = 79680972.

The previous prime is 79680961. The next prime is 79680977. The reversal of 79680973 is 37908697.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78801129 + 879844 = 8877^2 + 938^2 .

It is an emirp because it is prime and its reverse (37908697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79680973 - 2¹³ = 79672781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79680977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39840486 + 39840487.

It is an arithmetic number, because the mean of its divisors is an integer number (39840487).

Almost surely, 2^79680973 is an apocalyptic number.

It is an amenable number.

79680973 is a deficient number, since it is larger than the sum of its proper divisors (1).

79680973 is an equidigital number, since it uses as much as digits as its factorization.

79680973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 79680973 is about 8926.4199430679. The cubic root of 79680973 is about 430.3134059153.

The spelling of 79680973 in words is "seventy-nine million, six hundred eighty thousand, nine hundred seventy-three".