318980999 has 2 divisors, whose sum is σ = 318981000. Its totient is φ = 318980998.

The previous prime is 318980993. The next prime is 318981001. The reversal of 318980999 is 999089813.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318980999 is a prime.

Together with 318981001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318980993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159490499 + 159490500.

It is an arithmetic number, because the mean of its divisors is an integer number (159490500).

Almost surely, 2^318980999 is an apocalyptic number.

318980999 is a deficient number, since it is larger than the sum of its proper divisors (1).

318980999 is an equidigital number, since it uses as much as digits as its factorization.

318980999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 56.

The square root of 318980999 is about 17860.0391656905. The cubic root of 318980999 is about 683.2635786553.

The spelling of 318980999 in words is "three hundred eighteen million, nine hundred eighty thousand, nine hundred ninety-nine".