318391099 has 6 divisors (see below), whose sum is σ = 344766876. Its totient is φ = 293899320.

The previous prime is 318391067. The next prime is 318391121. The reversal of 318391099 is 990193813.

It is not a de Polignac number, because 318391099 - 2⁵ = 318391067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318391009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 941817 + ... + 942154.

It is an arithmetic number, because the mean of its divisors is an integer number (57461146).

Almost surely, 2^318391099 is an apocalyptic number.

318391099 is a deficient number, since it is larger than the sum of its proper divisors (26375777).

318391099 is a wasteful number, since it uses less digits than its factorization.

318391099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883997 (or 1883984 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 318391099 is about 17843.5170019814. The cubic root of 318391099 is about 682.8421262770.

The spelling of 318391099 in words is "three hundred eighteen million, three hundred ninety-one thousand, ninety-nine".