330831947 has 2 divisors, whose sum is σ = 330831948. Its totient is φ = 330831946.

The previous prime is 330831937. The next prime is 330831961. The reversal of 330831947 is 749138033.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 330831947 - 2¹⁰ = 330830923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 330831947.

It is not a weakly prime, because it can be changed into another prime (330831937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165415973 + 165415974.

It is an arithmetic number, because the mean of its divisors is an integer number (165415974).

Almost surely, 2^330831947 is an apocalyptic number.

330831947 is a deficient number, since it is larger than the sum of its proper divisors (1).

330831947 is an equidigital number, since it uses as much as digits as its factorization.

330831947 is an odious number, because the sum of its binary digits is odd.

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

The square root of 330831947 is about 18188.7862981563. The cubic root of 330831947 is about 691.6225534421.

The spelling of 330831947 in words is "three hundred thirty million, eight hundred thirty-one thousand, nine hundred forty-seven".