17998313 has 4 divisors (see below), whose sum is σ = 18140160. Its totient is φ = 17856468.

The previous prime is 17998289. The next prime is 17998327. The reversal of 17998313 is 31389971.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31389971 = 103 ⋅304757.

It is a cyclic number.

It is not a de Polignac number, because 17998313 - 2⁶ = 17998249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17298313) 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 3 ways as a sum of consecutive naturals, for example, 70733 + ... + 70986.

It is an arithmetic number, because the mean of its divisors is an integer number (4535040).

Almost surely, 2^17998313 is an apocalyptic number.

It is an amenable number.

17998313 is a deficient number, since it is larger than the sum of its proper divisors (141847).

17998313 is a wasteful number, since it uses less digits than its factorization.

17998313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141846.

The product of its digits is 40824, while the sum is 41.

The square root of 17998313 is about 4242.4418676041. The cubic root of 17998313 is about 262.0659517749.

The spelling of 17998313 in words is "seventeen million, nine hundred ninety-eight thousand, three hundred thirteen".