331334009 has 2 divisors, whose sum is σ = 331334010. Its totient is φ = 331334008.

The previous prime is 331333999. The next prime is 331334011. The reversal of 331334009 is 900433133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 325008784 + 6325225 = 18028^2 + 2515^2 .

It is a cyclic number.

It is not a de Polignac number, because 331334009 - 2⁸ = 331333753 is a prime.

Together with 331334011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (331334099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165667004 + 165667005.

It is an arithmetic number, because the mean of its divisors is an integer number (165667005).

Almost surely, 2^331334009 is an apocalyptic number.

It is an amenable number.

331334009 is a deficient number, since it is larger than the sum of its proper divisors (1).

331334009 is an equidigital number, since it uses as much as digits as its factorization.

331334009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 26.

The square root of 331334009 is about 18202.5824816151. The cubic root of 331334009 is about 691.9722394390.

The spelling of 331334009 in words is "three hundred thirty-one million, three hundred thirty-four thousand, nine".