398601289 has 2 divisors, whose sum is σ = 398601290. Its totient is φ = 398601288.

The previous prime is 398601263. The next prime is 398601319. The reversal of 398601289 is 982106893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398601225 + 64 = 19965^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 398601289 - 2⁵ = 398601257 is a prime.

It is not a weakly prime, because it can be changed into another prime (398601239) 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, 199300644 + 199300645.

It is an arithmetic number, because the mean of its divisors is an integer number (199300645).

Almost surely, 2^398601289 is an apocalyptic number.

It is an amenable number.

398601289 is a deficient number, since it is larger than the sum of its proper divisors (1).

398601289 is an equidigital number, since it uses as much as digits as its factorization.

398601289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 398601289 is about 19965.0016028048. The cubic root of 398601289 is about 735.9464808526.

The spelling of 398601289 in words is "three hundred ninety-eight million, six hundred one thousand, two hundred eighty-nine".