63399999 has 16 divisors (see below), whose sum is σ = 91439712. Its totient is φ = 38842368.

The previous prime is 63399977. The next prime is 63400009. The reversal of 63399999 is 99999336.

It is not a de Polignac number, because 63399999 - 2¹¹ = 63397951 is a prime.

63399999 is a modest number, since divided by 9999 gives 6339 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63399299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5599 + ... + 12575.

It is an arithmetic number, because the mean of its divisors is an integer number (5714982).

Almost surely, 2^63399999 is an apocalyptic number.

63399999 is a deficient number, since it is larger than the sum of its proper divisors (28039713).

63399999 is a wasteful number, since it uses less digits than its factorization.

63399999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7226.

The product of its digits is 3188646, while the sum is 57.

The square root of 63399999 is about 7962.4116321627. The cubic root of 63399999 is about 398.7460711805.

The spelling of 63399999 in words is "sixty-three million, three hundred ninety-nine thousand, nine hundred ninety-nine".