79134517993 has 2 divisors, whose sum is σ = 79134517994. Its totient is φ = 79134517992.

The previous prime is 79134517967. The next prime is 79134518039. The reversal of 79134517993 is 39971543197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48464701609 + 30669816384 = 220147^2 + 175128^2 .

It is a cyclic number.

It is not a de Polignac number, because 79134517993 - 2¹³ = 79134509801 is a prime.

It is not a weakly prime, because it can be changed into another prime (79134517933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39567258996 + 39567258997.

It is an arithmetic number, because the mean of its divisors is an integer number (39567258997).

Almost surely, 2^79134517993 is an apocalyptic number.

It is an amenable number.

79134517993 is a deficient number, since it is larger than the sum of its proper divisors (1).

79134517993 is an equidigital number, since it uses as much as digits as its factorization.

79134517993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6429780, while the sum is 58.

The spelling of 79134517993 in words is "seventy-nine billion, one hundred thirty-four million, five hundred seventeen thousand, nine hundred ninety-three".