398273329 has 2 divisors, whose sum is σ = 398273330. Its totient is φ = 398273328.

The previous prime is 398273311. The next prime is 398273333. The reversal of 398273329 is 923372893.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352575729 + 45697600 = 18777^2 + 6760^2 .

It is a cyclic number.

It is not a de Polignac number, because 398273329 - 2⁹ = 398272817 is a prime.

It is not a weakly prime, because it can be changed into another prime (398270329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199136664 + 199136665.

It is an arithmetic number, because the mean of its divisors is an integer number (199136665).

Almost surely, 2^398273329 is an apocalyptic number.

It is an amenable number.

398273329 is a deficient number, since it is larger than the sum of its proper divisors (1).

398273329 is an equidigital number, since it uses as much as digits as its factorization.

398273329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 46.

The square root of 398273329 is about 19956.7865399217. The cubic root of 398273329 is about 735.7445855082.

The spelling of 398273329 in words is "three hundred ninety-eight million, two hundred seventy-three thousand, three hundred twenty-nine".