331066913 has 2 divisors, whose sum is σ = 331066914. Its totient is φ = 331066912.

The previous prime is 331066909. The next prime is 331067053. The reversal of 331066913 is 319660133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320517409 + 10549504 = 17903^2 + 3248^2 .

It is a cyclic number.

It is not a de Polignac number, because 331066913 - 2² = 331066909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331066913.

It is not a weakly prime, because it can be changed into another prime (331366913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165533456 + 165533457.

It is an arithmetic number, because the mean of its divisors is an integer number (165533457).

Almost surely, 2^331066913 is an apocalyptic number.

It is an amenable number.

331066913 is a deficient number, since it is larger than the sum of its proper divisors (1).

331066913 is an equidigital number, since it uses as much as digits as its factorization.

331066913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 331066913 is about 18195.2442412846. The cubic root of 331066913 is about 691.7862511836.

The spelling of 331066913 in words is "three hundred thirty-one million, sixty-six thousand, nine hundred thirteen".