18098917 has 8 divisors (see below), whose sum is σ = 18892440. Its totient is φ = 17322240.

The previous prime is 18098909. The next prime is 18098923. The reversal of 18098917 is 71989081.

It can be written as a sum of positive squares in 4 ways, for example, as 2401 + 18096516 = 49^2 + 4254^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18098917 - 2³ = 18098909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18098617) 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, 1992 + ... + 6337.

It is an arithmetic number, because the mean of its divisors is an integer number (2361555).

Almost surely, 2^18098917 is an apocalyptic number.

It is an amenable number.

18098917 is a deficient number, since it is larger than the sum of its proper divisors (793523).

18098917 is an equidigital number, since it uses as much as digits as its factorization.

18098917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8423.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 18098917 is about 4254.2821956236. The cubic root of 18098917 is about 262.5533291499.

The spelling of 18098917 in words is "eighteen million, ninety-eight thousand, nine hundred seventeen".