79199797 has 2 divisors, whose sum is σ = 79199798. Its totient is φ = 79199796.

The previous prime is 79199789. The next prime is 79199819. The reversal of 79199797 is 79799197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69872881 + 9326916 = 8359^2 + 3054^2 .

It is a cyclic number.

It is not a de Polignac number, because 79199797 - 2³ = 79199789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79199717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39599898 + 39599899.

It is an arithmetic number, because the mean of its divisors is an integer number (39599899).

Almost surely, 2^79199797 is an apocalyptic number.

It is an amenable number.

79199797 is a deficient number, since it is larger than the sum of its proper divisors (1).

79199797 is an equidigital number, since it uses as much as digits as its factorization.

79199797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2250423, while the sum is 58.

The square root of 79199797 is about 8899.4267792931. The cubic root of 79199797 is about 429.4454668948.

The spelling of 79199797 in words is "seventy-nine million, one hundred ninety-nine thousand, seven hundred ninety-seven".