79193894369 has 2 divisors, whose sum is σ = 79193894370. Its totient is φ = 79193894368.

The previous prime is 79193894363. The next prime is 79193894401. The reversal of 79193894369 is 96349839197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68480609344 + 10713285025 = 261688^2 + 103505^2 .

It is a cyclic number.

It is not a de Polignac number, because 79193894369 - 2³² = 74898927073 is a prime.

It is a super-2 number, since 2×79193894369² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79193894299 and 79193894308.

It is not a weakly prime, because it can be changed into another prime (79193894363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39596947184 + 39596947185.

It is an arithmetic number, because the mean of its divisors is an integer number (39596947185).

Almost surely, 2^79193894369 is an apocalyptic number.

It is an amenable number.

79193894369 is a deficient number, since it is larger than the sum of its proper divisors (1).

79193894369 is an equidigital number, since it uses as much as digits as its factorization.

79193894369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79361856, while the sum is 68.

The spelling of 79193894369 in words is "seventy-nine billion, one hundred ninety-three million, eight hundred ninety-four thousand, three hundred sixty-nine".