79668899 has 2 divisors, whose sum is σ = 79668900. Its totient is φ = 79668898.

The previous prime is 79668877. The next prime is 79668907. The reversal of 79668899 is 99886697.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79668899 - 2⁸ = 79668643 is a prime.

It is not a weakly prime, because it can be changed into another prime (79668859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39834449 + 39834450.

It is an arithmetic number, because the mean of its divisors is an integer number (39834450).

Almost surely, 2^79668899 is an apocalyptic number.

79668899 is a deficient number, since it is larger than the sum of its proper divisors (1).

79668899 is an equidigital number, since it uses as much as digits as its factorization.

79668899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 62.

The square root of 79668899 is about 8925.7436104786. The cubic root of 79668899 is about 430.2916697913.

The spelling of 79668899 in words is "seventy-nine million, six hundred sixty-eight thousand, eight hundred ninety-nine".