63749871 has 12 divisors (see below), whose sum is σ = 92166048. Its totient is φ = 42461664.

The previous prime is 63749869. The next prime is 63749909. The reversal of 63749871 is 17894736.

63749871 is a `hidden beast` number, since 637 + 4 + 9 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 63749871 - 2¹ = 63749869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63749071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10426 + ... + 15368.

It is an arithmetic number, because the mean of its divisors is an integer number (7680504).

Almost surely, 2^63749871 is an apocalyptic number.

63749871 is a deficient number, since it is larger than the sum of its proper divisors (28416177).

63749871 is a wasteful number, since it uses less digits than its factorization.

63749871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6382 (or 6379 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 63749871 is about 7984.3516330382. The cubic root of 63749871 is about 399.4782175704.

It can be divided in two parts, 63749 and 871, that added together give a triangular number (64620 = T₃₅₉).

The spelling of 63749871 in words is "sixty-three million, seven hundred forty-nine thousand, eight hundred seventy-one".