398641259 has 2 divisors, whose sum is σ = 398641260. Its totient is φ = 398641258.

The previous prime is 398641241. The next prime is 398641273. The reversal of 398641259 is 952146893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398641259 - 2¹² = 398637163 is a prime.

It is not a weakly prime, because it can be changed into another prime (398641289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199320629 + 199320630.

It is an arithmetic number, because the mean of its divisors is an integer number (199320630).

Almost surely, 2^398641259 is an apocalyptic number.

398641259 is a deficient number, since it is larger than the sum of its proper divisors (1).

398641259 is an equidigital number, since it uses as much as digits as its factorization.

398641259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 47.

The square root of 398641259 is about 19966.0025793848. The cubic root of 398641259 is about 735.9710791989.

The spelling of 398641259 in words is "three hundred ninety-eight million, six hundred forty-one thousand, two hundred fifty-nine".