398329331 has 2 divisors, whose sum is σ = 398329332. Its totient is φ = 398329330.

The previous prime is 398329313. The next prime is 398329333. The reversal of 398329331 is 133923893.

Together with previous prime (398329313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (133923893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398329331 - 2¹⁴ = 398312947 is a prime.

It is a super-2 number, since 2×398329331² = 317332511869815122, which contains 22 as substring.

Together with 398329333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398329333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199164665 + 199164666.

It is an arithmetic number, because the mean of its divisors is an integer number (199164666).

Almost surely, 2^398329331 is an apocalyptic number.

398329331 is a deficient number, since it is larger than the sum of its proper divisors (1).

398329331 is an equidigital number, since it uses as much as digits as its factorization.

398329331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 41.

The square root of 398329331 is about 19958.1895722032. The cubic root of 398329331 is about 735.7790687255.

The spelling of 398329331 in words is "three hundred ninety-eight million, three hundred twenty-nine thousand, three hundred thirty-one".