398315329 has 2 divisors, whose sum is σ = 398315330. Its totient is φ = 398315328.

The previous prime is 398315279. The next prime is 398315339. The reversal of 398315329 is 923513893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243984400 + 154330929 = 15620^2 + 12423^2 .

It is a cyclic number.

It is not a de Polignac number, because 398315329 - 2²⁵ = 364760897 is a prime.

It is not a weakly prime, because it can be changed into another prime (398315339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199157664 + 199157665.

It is an arithmetic number, because the mean of its divisors is an integer number (199157665).

Almost surely, 2^398315329 is an apocalyptic number.

It is an amenable number.

398315329 is a deficient number, since it is larger than the sum of its proper divisors (1).

398315329 is an equidigital number, since it uses as much as digits as its factorization.

398315329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 43.

The square root of 398315329 is about 19957.8387858004. The cubic root of 398315329 is about 735.7704473006.

The spelling of 398315329 in words is "three hundred ninety-eight million, three hundred fifteen thousand, three hundred twenty-nine".