398203297 has 2 divisors, whose sum is σ = 398203298. Its totient is φ = 398203296.

The previous prime is 398203231. The next prime is 398203313. The reversal of 398203297 is 792302893.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 390497121 + 7706176 = 19761^2 + 2776^2 .

It is an emirp because it is prime and its reverse (792302893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398203297 is a prime.

It is not a weakly prime, because it can be changed into another prime (398207297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199101648 + 199101649.

It is an arithmetic number, because the mean of its divisors is an integer number (199101649).

Almost surely, 2^398203297 is an apocalyptic number.

It is an amenable number.

398203297 is a deficient number, since it is larger than the sum of its proper divisors (1).

398203297 is an equidigital number, since it uses as much as digits as its factorization.

398203297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 398203297 is about 19955.0318716859. The cubic root of 398203297 is about 735.7014587730.

The spelling of 398203297 in words is "three hundred ninety-eight million, two hundred three thousand, two hundred ninety-seven".