18098797 has 2 divisors, whose sum is σ = 18098798. Its totient is φ = 18098796.

The previous prime is 18098789. The next prime is 18098819. The reversal of 18098797 is 79789081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16232841 + 1865956 = 4029^2 + 1366^2 .

It is an emirp because it is prime and its reverse (79789081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18098797 - 2³ = 18098789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18098797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18098747) 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, 9049398 + 9049399.

It is an arithmetic number, because the mean of its divisors is an integer number (9049399).

Almost surely, 2^18098797 is an apocalyptic number.

It is an amenable number.

18098797 is a deficient number, since it is larger than the sum of its proper divisors (1).

18098797 is an equidigital number, since it uses as much as digits as its factorization.

18098797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 18098797 is about 4254.2680921634. The cubic root of 18098797 is about 262.5527488855.

The spelling of 18098797 in words is "eighteen million, ninety-eight thousand, seven hundred ninety-seven".