390481943 has 2 divisors, whose sum is σ = 390481944. Its totient is φ = 390481942.

The previous prime is 390481919. The next prime is 390481981. The reversal of 390481943 is 349184093.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390481943 is a prime.

It is a super-2 number, since 2×390481943² = 304952295618110498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 390481943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390481243) 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, 195240971 + 195240972.

It is an arithmetic number, because the mean of its divisors is an integer number (195240972).

Almost surely, 2^390481943 is an apocalyptic number.

390481943 is a deficient number, since it is larger than the sum of its proper divisors (1).

390481943 is an equidigital number, since it uses as much as digits as its factorization.

390481943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 390481943 is about 19760.6159569989. The cubic root of 390481943 is about 730.9151860668.

The spelling of 390481943 in words is "three hundred ninety million, four hundred eighty-one thousand, nine hundred forty-three".