79179927769 has 2 divisors, whose sum is σ = 79179927770. Its totient is φ = 79179927768.

The previous prime is 79179927763. The next prime is 79179927797. The reversal of 79179927769 is 96772997197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71118222400 + 8061705369 = 266680^2 + 89787^2 .

It is a cyclic number.

It is not a de Polignac number, because 79179927769 - 2⁵ = 79179927737 is a prime.

It is a super-2 number, since 2×79179927769² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79179927763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39589963884 + 39589963885.

It is an arithmetic number, because the mean of its divisors is an integer number (39589963885).

Almost surely, 2^79179927769 is an apocalyptic number.

It is an amenable number.

79179927769 is a deficient number, since it is larger than the sum of its proper divisors (1).

79179927769 is an equidigital number, since it uses as much as digits as its factorization.

79179927769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189035532, while the sum is 73.

The spelling of 79179927769 in words is "seventy-nine billion, one hundred seventy-nine million, nine hundred twenty-seven thousand, seven hundred sixty-nine".