390328817 has 2 divisors, whose sum is σ = 390328818. Its totient is φ = 390328816.

The previous prime is 390328811. The next prime is 390328889. The reversal of 390328817 is 718823093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257249521 + 133079296 = 16039^2 + 11536^2 .

It is a cyclic number.

It is not a de Polignac number, because 390328817 - 2⁶ = 390328753 is a prime.

It is not a weakly prime, because it can be changed into another prime (390328811) 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 as a sum of consecutive naturals, namely, 195164408 + 195164409.

It is an arithmetic number, because the mean of its divisors is an integer number (195164409).

Almost surely, 2^390328817 is an apocalyptic number.

It is an amenable number.

390328817 is a deficient number, since it is larger than the sum of its proper divisors (1).

390328817 is an equidigital number, since it uses as much as digits as its factorization.

390328817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 390328817 is about 19756.7410521067. The cubic root of 390328817 is about 730.8196317107.

The spelling of 390328817 in words is "three hundred ninety million, three hundred twenty-eight thousand, eight hundred seventeen".