63444987 has 12 divisors (see below), whose sum is σ = 91840320. Its totient is φ = 42205488.

The previous prime is 63444977. The next prime is 63444989. The reversal of 63444987 is 78944436.

63444987 is a `hidden beast` number, since 634 + 4 + 4 + 9 + 8 + 7 = 666.

It is not a de Polignac number, because 63444987 - 2⁷ = 63444859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63444989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3048 + ... + 11669.

It is an arithmetic number, because the mean of its divisors is an integer number (7653360).

Almost surely, 2^63444987 is an apocalyptic number.

63444987 is a deficient number, since it is larger than the sum of its proper divisors (28395333).

63444987 is a wasteful number, since it uses less digits than its factorization.

63444987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15202 (or 15199 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 63444987 is about 7965.2361546912. The cubic root of 63444987 is about 398.8403642780.

The spelling of 63444987 in words is "sixty-three million, four hundred forty-four thousand, nine hundred eighty-seven".