331593397 has 4 divisors (see below), whose sum is σ = 331879680. Its totient is φ = 331307116.

The previous prime is 331593373. The next prime is 331593401. The reversal of 331593397 is 793395133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331593397 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 (331593307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141397 + ... + 143722.

It is an arithmetic number, because the mean of its divisors is an integer number (82969920).

Almost surely, 2^331593397 is an apocalyptic number.

It is an amenable number.

331593397 is a deficient number, since it is larger than the sum of its proper divisors (286283).

331593397 is a wasteful number, since it uses less digits than its factorization.

331593397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286282.

The product of its digits is 229635, while the sum is 43.

The square root of 331593397 is about 18209.7061206380. The cubic root of 331593397 is about 692.1527647020.

The spelling of 331593397 in words is "three hundred thirty-one million, five hundred ninety-three thousand, three hundred ninety-seven".