331087493 has 4 divisors (see below), whose sum is σ = 361186368. Its totient is φ = 300988620.

The previous prime is 331087469. The next prime is 331087501. The reversal of 331087493 is 394780133.

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 not a de Polignac number, because 331087493 - 2⁶ = 331087429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331081493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15049421 + ... + 15049442.

It is an arithmetic number, because the mean of its divisors is an integer number (90296592).

Almost surely, 2^331087493 is an apocalyptic number.

It is an amenable number.

331087493 is a deficient number, since it is larger than the sum of its proper divisors (30098875).

331087493 is a wasteful number, since it uses less digits than its factorization.

331087493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30098874.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 331087493 is about 18195.8097648882. The cubic root of 331087493 is about 691.8005853111.

The spelling of 331087493 in words is "three hundred thirty-one million, eighty-seven thousand, four hundred ninety-three".