398339833 has 2 divisors, whose sum is σ = 398339834. Its totient is φ = 398339832.

The previous prime is 398339813. The next prime is 398339839. The reversal of 398339833 is 338933893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342509049 + 55830784 = 18507^2 + 7472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398339833 is a prime.

It is not a weakly prime, because it can be changed into another prime (398339839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199169916 + 199169917.

It is an arithmetic number, because the mean of its divisors is an integer number (199169917).

Almost surely, 2^398339833 is an apocalyptic number.

It is an amenable number.

398339833 is a deficient number, since it is larger than the sum of its proper divisors (1).

398339833 is an equidigital number, since it uses as much as digits as its factorization.

398339833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 49.

The square root of 398339833 is about 19958.4526704853. The cubic root of 398339833 is about 735.7855349694.

The spelling of 398339833 in words is "three hundred ninety-eight million, three hundred thirty-nine thousand, eight hundred thirty-three".