390955963 has 2 divisors, whose sum is σ = 390955964. Its totient is φ = 390955962.

The previous prime is 390955937. The next prime is 390956003. The reversal of 390955963 is 369559093.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 390955963 - 2¹³ = 390947771 is a prime.

It is not a weakly prime, because it can be changed into another prime (390955163) 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, 195477981 + 195477982.

It is an arithmetic number, because the mean of its divisors is an integer number (195477982).

Almost surely, 2^390955963 is an apocalyptic number.

390955963 is a deficient number, since it is larger than the sum of its proper divisors (1).

390955963 is an equidigital number, since it uses as much as digits as its factorization.

390955963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 984150, while the sum is 49.

The square root of 390955963 is about 19772.6063785228. The cubic root of 390955963 is about 731.2108278332.

The spelling of 390955963 in words is "three hundred ninety million, nine hundred fifty-five thousand, nine hundred sixty-three".