318199989 has 8 divisors (see below), whose sum is σ = 424360512. Its totient is φ = 212086400.

The previous prime is 318199943. The next prime is 318199993. The reversal of 318199989 is 989991813.

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 318199989 - 2¹⁵ = 318167221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318199939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9664 + ... + 27014.

It is an arithmetic number, because the mean of its divisors is an integer number (53045064).

Almost surely, 2^318199989 is an apocalyptic number.

It is an amenable number.

318199989 is a deficient number, since it is larger than the sum of its proper divisors (106160523).

318199989 is a wasteful number, since it uses less digits than its factorization.

318199989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23467.

The product of its digits is 1259712, while the sum is 57.

The square root of 318199989 is about 17838.1610319001. The cubic root of 318199989 is about 682.7054766472.

The spelling of 318199989 in words is "three hundred eighteen million, one hundred ninety-nine thousand, nine hundred eighty-nine".