475643999 has 2 divisors, whose sum is σ = 475644000. Its totient is φ = 475643998.

The previous prime is 475643963. The next prime is 475644041. The reversal of 475643999 is 999346574.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 475643999 - 2¹² = 475639903 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 (475643099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237821999 + 237822000.

It is an arithmetic number, because the mean of its divisors is an integer number (237822000).

Almost surely, 2^475643999 is an apocalyptic number.

475643999 is a deficient number, since it is larger than the sum of its proper divisors (1).

475643999 is an equidigital number, since it uses as much as digits as its factorization.

475643999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7348320, while the sum is 56.

The square root of 475643999 is about 21809.2640636955. The cubic root of 475643999 is about 780.5978317247.

The spelling of 475643999 in words is "four hundred seventy-five million, six hundred forty-three thousand, nine hundred ninety-nine".