18379799 has 2 divisors, whose sum is σ = 18379800. Its totient is φ = 18379798.

The previous prime is 18379793. The next prime is 18379811. The reversal of 18379799 is 99797381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18379799 - 2¹² = 18375703 is a prime.

It is a super-2 number, since 2×18379799² = 675634022560802, which contains 22 as substring.

It is a Sophie Germain 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 18379799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18379793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9189899 + 9189900.

It is an arithmetic number, because the mean of its divisors is an integer number (9189900).

Almost surely, 2^18379799 is an apocalyptic number.

18379799 is a deficient number, since it is larger than the sum of its proper divisors (1).

18379799 is an equidigital number, since it uses as much as digits as its factorization.

18379799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 53.

The square root of 18379799 is about 4287.1667800542. The cubic root of 18379799 is about 263.9045750544.

The spelling of 18379799 in words is "eighteen million, three hundred seventy-nine thousand, seven hundred ninety-nine".