398519999 has 2 divisors, whose sum is σ = 398520000. Its totient is φ = 398519998.

The previous prime is 398519983. The next prime is 398520013. The reversal of 398519999 is 999915893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398519999 - 2⁴ = 398519983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398519929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199259999 + 199260000.

It is an arithmetic number, because the mean of its divisors is an integer number (199260000).

Almost surely, 2^398519999 is an apocalyptic number.

398519999 is a deficient number, since it is larger than the sum of its proper divisors (1).

398519999 is an equidigital number, since it uses as much as digits as its factorization.

398519999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7085880, while the sum is 62.

The square root of 398519999 is about 19962.9656864906. The cubic root of 398519999 is about 735.8964482691.

It can be divided in two parts, 398 and 519999, that multiplied together give a palindrome (206959602).

The spelling of 398519999 in words is "three hundred ninety-eight million, five hundred nineteen thousand, nine hundred ninety-nine".