396446399 has 2 divisors, whose sum is σ = 396446400. Its totient is φ = 396446398.

The previous prime is 396446371. The next prime is 396446417. The reversal of 396446399 is 993644693.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 396446399 - 2²⁰ = 395397823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 396446399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396446329) 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, 198223199 + 198223200.

It is an arithmetic number, because the mean of its divisors is an integer number (198223200).

Almost surely, 2^396446399 is an apocalyptic number.

396446399 is a deficient number, since it is larger than the sum of its proper divisors (1).

396446399 is an equidigital number, since it uses as much as digits as its factorization.

396446399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 53.

The square root of 396446399 is about 19910.9617798840. The cubic root of 396446399 is about 734.6178765548.

The spelling of 396446399 in words is "three hundred ninety-six million, four hundred forty-six thousand, three hundred ninety-nine".