63317999 has 4 divisors (see below), whose sum is σ = 63909864. Its totient is φ = 62726136.

The previous prime is 63317971. The next prime is 63318001. The reversal of 63317999 is 99971336.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63317999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63317909) 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 in 3 ways as a sum of consecutive naturals, for example, 295772 + ... + 295985.

It is an arithmetic number, because the mean of its divisors is an integer number (15977466).

Almost surely, 2^63317999 is an apocalyptic number.

63317999 is a deficient number, since it is larger than the sum of its proper divisors (591865).

63317999 is a wasteful number, since it uses less digits than its factorization.

63317999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591864.

The product of its digits is 275562, while the sum is 47.

The square root of 63317999 is about 7957.2607724015. The cubic root of 63317999 is about 398.5740875576.

The spelling of 63317999 in words is "sixty-three million, three hundred seventeen thousand, nine hundred ninety-nine".