312398681 has 16 divisors (see below), whose sum is σ = 378556416. Its totient is φ = 251667456.

The previous prime is 312398623. The next prime is 312398683. The reversal of 312398681 is 186893213.

It is not a de Polignac number, because 312398681 - 2⁶ = 312398617 is a prime.

It is a super-2 number, since 2×312398681² = 195185871781079522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312398683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114920 + ... + 117606.

It is an arithmetic number, because the mean of its divisors is an integer number (23659776).

Almost surely, 2^312398681 is an apocalyptic number.

It is an amenable number.

312398681 is a deficient number, since it is larger than the sum of its proper divisors (66157735).

312398681 is a wasteful number, since it uses less digits than its factorization.

312398681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3688.

The product of its digits is 62208, while the sum is 41.

The square root of 312398681 is about 17674.8035632649. The cubic root of 312398681 is about 678.5310570003.

The spelling of 312398681 in words is "three hundred twelve million, three hundred ninety-eight thousand, six hundred eighty-one".