115664779 has 2 divisors, whose sum is σ = 115664780. Its totient is φ = 115664778.

The previous prime is 115664743. The next prime is 115664833. The reversal of 115664779 is 977466511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115664779 - 2¹¹ = 115662731 is a prime.

It is a super-2 number, since 2×115664779² = 26756682202237682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (115664729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57832389 + 57832390.

It is an arithmetic number, because the mean of its divisors is an integer number (57832390).

Almost surely, 2^115664779 is an apocalyptic number.

115664779 is a deficient number, since it is larger than the sum of its proper divisors (1).

115664779 is an equidigital number, since it uses as much as digits as its factorization.

115664779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 46.

The square root of 115664779 is about 10754.7561106703. The cubic root of 115664779 is about 487.2296519005.

The spelling of 115664779 in words is "one hundred fifteen million, six hundred sixty-four thousand, seven hundred seventy-nine".