79917599 has 2 divisors, whose sum is σ = 79917600. Its totient is φ = 79917598.

The previous prime is 79917583. The next prime is 79917611. The reversal of 79917599 is 99571997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79917599 - 2⁴ = 79917583 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79917559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39958799 + 39958800.

It is an arithmetic number, because the mean of its divisors is an integer number (39958800).

Almost surely, 2^79917599 is an apocalyptic number.

79917599 is a deficient number, since it is larger than the sum of its proper divisors (1).

79917599 is an equidigital number, since it uses as much as digits as its factorization.

79917599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1607445, while the sum is 56.

The square root of 79917599 is about 8939.6643673015. The cubic root of 79917599 is about 430.7389475400.

The spelling of 79917599 in words is "seventy-nine million, nine hundred seventeen thousand, five hundred ninety-nine".