63998573 has 4 divisors (see below), whose sum is σ = 64182300. Its totient is φ = 63814848.

The previous prime is 63998569. The next prime is 63998579. The reversal of 63998573 is 37589936.

63998573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18003049 + 45995524 = 4243^2 + 6782^2 .

It is a cyclic number.

It is not a de Polignac number, because 63998573 - 2² = 63998569 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 (63998579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91340 + ... + 92037.

It is an arithmetic number, because the mean of its divisors is an integer number (16045575).

Almost surely, 2^63998573 is an apocalyptic number.

It is an amenable number.

63998573 is a deficient number, since it is larger than the sum of its proper divisors (183727).

63998573 is a wasteful number, since it uses less digits than its factorization.

63998573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183726.

The product of its digits is 1224720, while the sum is 50.

The square root of 63998573 is about 7999.9108120028. The cubic root of 63998573 is about 399.9970270612.

The spelling of 63998573 in words is "sixty-three million, nine hundred ninety-eight thousand, five hundred seventy-three".