331346399 has 4 divisors (see below), whose sum is σ = 332578440. Its totient is φ = 330114360.

The previous prime is 331346387. The next prime is 331346401. The reversal of 331346399 is 993643133.

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

It is a cyclic number.

It is not a de Polignac number, because 331346399 - 2⁸ = 331346143 is a prime.

It is a super-2 number, since 2×331346399² = 219580872260534402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331346329) 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, 615617 + ... + 616154.

It is an arithmetic number, because the mean of its divisors is an integer number (83144610).

Almost surely, 2^331346399 is an apocalyptic number.

331346399 is a deficient number, since it is larger than the sum of its proper divisors (1232041).

331346399 is a wasteful number, since it uses less digits than its factorization.

331346399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232040.

The product of its digits is 157464, while the sum is 41.

The square root of 331346399 is about 18202.9228147570. The cubic root of 331346399 is about 691.9808646017.

The spelling of 331346399 in words is "three hundred thirty-one million, three hundred forty-six thousand, three hundred ninety-nine".