318898997 has 4 divisors (see below), whose sum is σ = 319190796. Its totient is φ = 318607200.

The previous prime is 318898981. The next prime is 318899003. The reversal of 318898997 is 799898813.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 190053796 + 128845201 = 13786^2 + 11351^2 .

It is a cyclic number.

It is not a de Polignac number, because 318898997 - 2⁴ = 318898981 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 (318898927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144254 + ... + 146447.

It is an arithmetic number, because the mean of its divisors is an integer number (79797699).

Almost surely, 2^318898997 is an apocalyptic number.

It is an amenable number.

318898997 is a deficient number, since it is larger than the sum of its proper divisors (291799).

318898997 is a wasteful number, since it uses less digits than its factorization.

318898997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291798.

The product of its digits is 7838208, while the sum is 62.

The square root of 318898997 is about 17857.7433344754. The cubic root of 318898997 is about 683.2050236713.

The spelling of 318898997 in words is "three hundred eighteen million, eight hundred ninety-eight thousand, nine hundred ninety-seven".