396239399 has 2 divisors, whose sum is σ = 396239400. Its totient is φ = 396239398.

The previous prime is 396239381. The next prime is 396239443. The reversal of 396239399 is 993932693.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396239399 is a prime.

It is a super-2 number, since 2×396239399² = 314011322639762402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 396239399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396239309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198119699 + 198119700.

It is an arithmetic number, because the mean of its divisors is an integer number (198119700).

Almost surely, 2^396239399 is an apocalyptic number.

396239399 is a deficient number, since it is larger than the sum of its proper divisors (1).

396239399 is an equidigital number, since it uses as much as digits as its factorization.

396239399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2125764, while the sum is 53.

The square root of 396239399 is about 19905.7629595050. The cubic root of 396239399 is about 734.4899968254.

The spelling of 396239399 in words is "three hundred ninety-six million, two hundred thirty-nine thousand, three hundred ninety-nine".