398325289 has 2 divisors, whose sum is σ = 398325290. Its totient is φ = 398325288.

The previous prime is 398325271. The next prime is 398325311. The reversal of 398325289 is 982523893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396686889 + 1638400 = 19917^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 398325289 - 2²⁷ = 264107561 is a prime.

It is not a weakly prime, because it can be changed into another prime (398325089) 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, 199162644 + 199162645.

It is an arithmetic number, because the mean of its divisors is an integer number (199162645).

Almost surely, 2^398325289 is an apocalyptic number.

It is an amenable number.

398325289 is a deficient number, since it is larger than the sum of its proper divisors (1).

398325289 is an equidigital number, since it uses as much as digits as its factorization.

398325289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 49.

The square root of 398325289 is about 19958.0883102566. The cubic root of 398325289 is about 735.7765799732.

The spelling of 398325289 in words is "three hundred ninety-eight million, three hundred twenty-five thousand, two hundred eighty-nine".