396859999 has 2 divisors, whose sum is σ = 396860000. Its totient is φ = 396859998.

The previous prime is 396859993. The next prime is 396860017. The reversal of 396859999 is 999958693.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 396859999 - 2¹⁵ = 396827231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396859993) 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, 198429999 + 198430000.

It is an arithmetic number, because the mean of its divisors is an integer number (198430000).

Almost surely, 2^396859999 is an apocalyptic number.

396859999 is a deficient number, since it is larger than the sum of its proper divisors (1).

396859999 is an equidigital number, since it uses as much as digits as its factorization.

396859999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42515280, while the sum is 67.

The square root of 396859999 is about 19921.3453109974. The cubic root of 396859999 is about 734.8732556377.

The spelling of 396859999 in words is "three hundred ninety-six million, eight hundred fifty-nine thousand, nine hundred ninety-nine".