18873199 has 2 divisors, whose sum is σ = 18873200. Its totient is φ = 18873198.

The previous prime is 18873181. The next prime is 18873227. The reversal of 18873199 is 99137881.

It is a weak prime.

It is an emirp because it is prime and its reverse (99137881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18873199 - 2⁵ = 18873167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18873109) 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, 9436599 + 9436600.

It is an arithmetic number, because the mean of its divisors is an integer number (9436600).

Almost surely, 2^18873199 is an apocalyptic number.

18873199 is a deficient number, since it is larger than the sum of its proper divisors (1).

18873199 is an equidigital number, since it uses as much as digits as its factorization.

18873199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 46.

The square root of 18873199 is about 4344.3295224925. The cubic root of 18873199 is about 266.2452324155.

The spelling of 18873199 in words is "eighteen million, eight hundred seventy-three thousand, one hundred ninety-nine".