63499873 has 8 divisors (see below), whose sum is σ = 66068480. Its totient is φ = 60967620.

The previous prime is 63499861. The next prime is 63499889. The reversal of 63499873 is 37899436.

It is a de Polignac number, because none of the positive numbers 2^k-63499873 is a prime.

It is a super-2 number, since 2×63499873² = 8064467742032258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63499673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499936 + ... + 500062.

It is an arithmetic number, because the mean of its divisors is an integer number (8258560).

Almost surely, 2^63499873 is an apocalyptic number.

It is an amenable number.

63499873 is a deficient number, since it is larger than the sum of its proper divisors (2568607).

63499873 is an frugal number, since it uses more digits than its factorization.

63499873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 158 counting only the distinct ones).

The product of its digits is 979776, while the sum is 49.

The square root of 63499873 is about 7968.6807565619. The cubic root of 63499873 is about 398.9553428537.

The spelling of 63499873 in words is "sixty-three million, four hundred ninety-nine thousand, eight hundred seventy-three".