398131259 has 2 divisors, whose sum is σ = 398131260. Its totient is φ = 398131258.

The previous prime is 398131243. The next prime is 398131289. The reversal of 398131259 is 952131893.

It is a weak prime.

It is an emirp because it is prime and its reverse (952131893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398131259 - 2⁴ = 398131243 is a prime.

It is not a weakly prime, because it can be changed into another prime (398131229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199065629 + 199065630.

It is an arithmetic number, because the mean of its divisors is an integer number (199065630).

Almost surely, 2^398131259 is an apocalyptic number.

398131259 is a deficient number, since it is larger than the sum of its proper divisors (1).

398131259 is an equidigital number, since it uses as much as digits as its factorization.

398131259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 398131259 is about 19953.2267816511. The cubic root of 398131259 is about 735.6570914374.

The spelling of 398131259 in words is "three hundred ninety-eight million, one hundred thirty-one thousand, two hundred fifty-nine".