398475919 has 2 divisors, whose sum is σ = 398475920. Its totient is φ = 398475918.

The previous prime is 398475893. The next prime is 398475941. The reversal of 398475919 is 919574893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398475919 - 2¹⁷ = 398344847 is a prime.

It is a super-2 number, since 2×398475919² = 317566116045789122, 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 398475919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398475949) 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, 199237959 + 199237960.

It is an arithmetic number, because the mean of its divisors is an integer number (199237960).

Almost surely, 2^398475919 is an apocalyptic number.

398475919 is a deficient number, since it is larger than the sum of its proper divisors (1).

398475919 is an equidigital number, since it uses as much as digits as its factorization.

398475919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 55.

The square root of 398475919 is about 19961.8616115832. The cubic root of 398475919 is about 735.8693149495.

The spelling of 398475919 in words is "three hundred ninety-eight million, four hundred seventy-five thousand, nine hundred nineteen".