79617899 has 2 divisors, whose sum is σ = 79617900. Its totient is φ = 79617898.

The previous prime is 79617883. The next prime is 79617911. The reversal of 79617899 is 99871697.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79617899 - 2⁴ = 79617883 is a prime.

It is not a weakly prime, because it can be changed into another prime (79617869) 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, 39808949 + 39808950.

It is an arithmetic number, because the mean of its divisors is an integer number (39808950).

Almost surely, 2^79617899 is an apocalyptic number.

79617899 is a deficient number, since it is larger than the sum of its proper divisors (1).

79617899 is an equidigital number, since it uses as much as digits as its factorization.

79617899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 56.

The square root of 79617899 is about 8922.8862482943. The cubic root of 79617899 is about 430.1998332036.

The spelling of 79617899 in words is "seventy-nine million, six hundred seventeen thousand, eight hundred ninety-nine".