390351901 has 2 divisors, whose sum is σ = 390351902. Its totient is φ = 390351900.

The previous prime is 390351881. The next prime is 390351947. The reversal of 390351901 is 109153093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260984025 + 129367876 = 16155^2 + 11374^2 .

It is a cyclic number.

It is not a de Polignac number, because 390351901 - 2²⁷ = 256134173 is a prime.

It is a super-2 number, since 2×390351901² = 304749213228627602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390351601) 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, 195175950 + 195175951.

It is an arithmetic number, because the mean of its divisors is an integer number (195175951).

Almost surely, 2^390351901 is an apocalyptic number.

It is an amenable number.

390351901 is a deficient number, since it is larger than the sum of its proper divisors (1).

390351901 is an equidigital number, since it uses as much as digits as its factorization.

390351901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 390351901 is about 19757.3252491323. The cubic root of 390351901 is about 730.8340382888.

The spelling of 390351901 in words is "three hundred ninety million, three hundred fifty-one thousand, nine hundred one".