398207399 has 2 divisors, whose sum is σ = 398207400. Its totient is φ = 398207398.

The previous prime is 398207389. The next prime is 398207483. The reversal of 398207399 is 993702893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398207399 - 2⁸ = 398207143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398207389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199103699 + 199103700.

It is an arithmetic number, because the mean of its divisors is an integer number (199103700).

Almost surely, 2^398207399 is an apocalyptic number.

398207399 is a deficient number, since it is larger than the sum of its proper divisors (1).

398207399 is an equidigital number, since it uses as much as digits as its factorization.

398207399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 398207399 is about 19955.1346525149. The cubic root of 398207399 is about 735.7039849843.

The spelling of 398207399 in words is "three hundred ninety-eight million, two hundred seven thousand, three hundred ninety-nine".