398180539 has 2 divisors, whose sum is σ = 398180540. Its totient is φ = 398180538.

The previous prime is 398180533. The next prime is 398180551. The reversal of 398180539 is 935081893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398180539 - 2²³ = 389791931 is a prime.

It is not a weakly prime, because it can be changed into another prime (398180533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199090269 + 199090270.

It is an arithmetic number, because the mean of its divisors is an integer number (199090270).

Almost surely, 2^398180539 is an apocalyptic number.

398180539 is a deficient number, since it is larger than the sum of its proper divisors (1).

398180539 is an equidigital number, since it uses as much as digits as its factorization.

398180539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 398180539 is about 19954.4616314247. The cubic root of 398180539 is about 735.6874429734.

The spelling of 398180539 in words is "three hundred ninety-eight million, one hundred eighty thousand, five hundred thirty-nine".