398331629 has 2 divisors, whose sum is σ = 398331630. Its totient is φ = 398331628.

The previous prime is 398331613. The next prime is 398331649. The reversal of 398331629 is 926133893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371602729 + 26728900 = 19277^2 + 5170^2 .

It is a cyclic number.

It is not a de Polignac number, because 398331629 - 2⁴ = 398331613 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398331629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398331649) 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, 199165814 + 199165815.

It is an arithmetic number, because the mean of its divisors is an integer number (199165815).

Almost surely, 2^398331629 is an apocalyptic number.

It is an amenable number.

398331629 is a deficient number, since it is larger than the sum of its proper divisors (1).

398331629 is an equidigital number, since it uses as much as digits as its factorization.

398331629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 44.

The square root of 398331629 is about 19958.2471424722. The cubic root of 398331629 is about 735.7804836493.

The spelling of 398331629 in words is "three hundred ninety-eight million, three hundred thirty-one thousand, six hundred twenty-nine".