18098997 has 8 divisors (see below), whose sum is σ = 27579456. Its totient is φ = 10342272.

The previous prime is 18098923. The next prime is 18099007. The reversal of 18098997 is 79989081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18098997 - 2¹⁴ = 18082613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18098497) 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 in 7 ways as a sum of consecutive naturals, for example, 430908 + ... + 430949.

It is an arithmetic number, because the mean of its divisors is an integer number (3447432).

Almost surely, 2^18098997 is an apocalyptic number.

It is an amenable number.

18098997 is a deficient number, since it is larger than the sum of its proper divisors (9480459).

18098997 is an equidigital number, since it uses as much as digits as its factorization.

18098997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861867.

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 18098997 is about 4254.2915979044. The cubic root of 18098997 is about 262.5537159913.

The spelling of 18098997 in words is "eighteen million, ninety-eight thousand, nine hundred ninety-seven".