79134720017 has 2 divisors, whose sum is σ = 79134720018. Its totient is φ = 79134720016.

The previous prime is 79134719987. The next prime is 79134720037. The reversal of 79134720017 is 71002743197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72444952336 + 6689767681 = 269156^2 + 81791^2 .

It is an emirp because it is prime and its reverse (71002743197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79134720017 - 2²⁸ = 78866284561 is a prime.

It is not a weakly prime, because it can be changed into another prime (79134720037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39567360008 + 39567360009.

It is an arithmetic number, because the mean of its divisors is an integer number (39567360009).

Almost surely, 2^79134720017 is an apocalyptic number.

It is an amenable number.

79134720017 is a deficient number, since it is larger than the sum of its proper divisors (1).

79134720017 is an equidigital number, since it uses as much as digits as its factorization.

79134720017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 41.

The spelling of 79134720017 in words is "seventy-nine billion, one hundred thirty-four million, seven hundred twenty thousand, seventeen".