18799199 has 2 divisors, whose sum is σ = 18799200. Its totient is φ = 18799198.

The previous prime is 18799177. The next prime is 18799223. The reversal of 18799199 is 99199781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18799199 - 2⁸ = 18798943 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 18799199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18799499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9399599 + 9399600.

It is an arithmetic number, because the mean of its divisors is an integer number (9399600).

Almost surely, 2^18799199 is an apocalyptic number.

18799199 is a deficient number, since it is larger than the sum of its proper divisors (1).

18799199 is an equidigital number, since it uses as much as digits as its factorization.

18799199 is an evil number, because the sum of its binary digits is even.

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

The square root of 18799199 is about 4335.8043083147. The cubic root of 18799199 is about 265.8968026393.

The spelling of 18799199 in words is "eighteen million, seven hundred ninety-nine thousand, one hundred ninety-nine".