79981199 has 2 divisors, whose sum is σ = 79981200. Its totient is φ = 79981198.

The previous prime is 79981163. The next prime is 79981219. The reversal of 79981199 is 99118997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79981199 - 2¹² = 79977103 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79981199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79981129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39990599 + 39990600.

It is an arithmetic number, because the mean of its divisors is an integer number (39990600).

Almost surely, 2^79981199 is an apocalyptic number.

79981199 is a deficient number, since it is larger than the sum of its proper divisors (1).

79981199 is an equidigital number, since it uses as much as digits as its factorization.

79981199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 53.

The square root of 79981199 is about 8943.2208403908. The cubic root of 79981199 is about 430.8531807563.

The spelling of 79981199 in words is "seventy-nine million, nine hundred eighty-one thousand, one hundred ninety-nine".