330781997 has 32 divisors (see below), whose sum is σ = 429004800. Its totient is φ = 253169280.

The previous prime is 330781987. The next prime is 330781999. The reversal of 330781997 is 799187033.

It is not a de Polignac number, because 330781997 - 2⁶ = 330781933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (330781999) 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 31 ways as a sum of consecutive naturals, for example, 137033 + ... + 139425.

It is an arithmetic number, because the mean of its divisors is an integer number (13406400).

Almost surely, 2^330781997 is an apocalyptic number.

It is an amenable number.

330781997 is a deficient number, since it is larger than the sum of its proper divisors (98222803).

330781997 is a wasteful number, since it uses less digits than its factorization.

330781997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458 (or 2444 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 330781997 is about 18187.4131475589. The cubic root of 330781997 is about 691.5877439408.

The spelling of 330781997 in words is "three hundred thirty million, seven hundred eighty-one thousand, nine hundred ninety-seven".