398159387 has 2 divisors, whose sum is σ = 398159388. Its totient is φ = 398159386.

The previous prime is 398159369. The next prime is 398159393. The reversal of 398159387 is 783951893.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398159387 - 2¹⁴ = 398143003 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398159347) 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, 199079693 + 199079694.

It is an arithmetic number, because the mean of its divisors is an integer number (199079694).

Almost surely, 2^398159387 is an apocalyptic number.

398159387 is a deficient number, since it is larger than the sum of its proper divisors (1).

398159387 is an equidigital number, since it uses as much as digits as its factorization.

398159387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 53.

The square root of 398159387 is about 19953.9316176036. The cubic root of 398159387 is about 735.6744157703.

The spelling of 398159387 in words is "three hundred ninety-eight million, one hundred fifty-nine thousand, three hundred eighty-seven".