398343349 has 2 divisors, whose sum is σ = 398343350. Its totient is φ = 398343348.

The previous prime is 398343347. The next prime is 398343367. The reversal of 398343349 is 943343893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218300625 + 180042724 = 14775^2 + 13418^2 .

It is an emirp because it is prime and its reverse (943343893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398343349 - 2¹ = 398343347 is a prime.

Together with 398343347, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 398343299 and 398343308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398343347) 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, 199171674 + 199171675.

It is an arithmetic number, because the mean of its divisors is an integer number (199171675).

Almost surely, 2^398343349 is an apocalyptic number.

It is an amenable number.

398343349 is a deficient number, since it is larger than the sum of its proper divisors (1).

398343349 is an equidigital number, since it uses as much as digits as its factorization.

398343349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 46.

The square root of 398343349 is about 19958.5407532715. The cubic root of 398343349 is about 735.7876997996.

The spelling of 398343349 in words is "three hundred ninety-eight million, three hundred forty-three thousand, three hundred forty-nine".