63889725 has 12 divisors (see below), whose sum is σ = 105631136. Its totient is φ = 34074480.

The previous prime is 63889687. The next prime is 63889739. The reversal of 63889725 is 52798836.

It is not a de Polignac number, because 63889725 - 2¹² = 63885629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 425857 + ... + 426006.

Almost surely, 2^63889725 is an apocalyptic number.

It is an amenable number.

63889725 is a deficient number, since it is larger than the sum of its proper divisors (41741411).

63889725 is a wasteful number, since it uses less digits than its factorization.

63889725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851876 (or 851871 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 63889725 is about 7993.1048410489. The cubic root of 63889725 is about 399.7701283395.

The spelling of 63889725 in words is "sixty-three million, eight hundred eighty-nine thousand, seven hundred twenty-five".