63686875 has 20 divisors (see below), whose sum is σ = 90958384. Its totient is φ = 43668000.

The previous prime is 63686869. The next prime is 63686911. The reversal of 63686875 is 57868636.

It is a happy number.

It is not a de Polignac number, because 63686875 - 2¹³ = 63678683 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2904 + ... + 11653.

Almost surely, 2^63686875 is an apocalyptic number.

63686875 is a deficient number, since it is larger than the sum of its proper divisors (27271509).

63686875 is an equidigital number, since it uses as much as digits as its factorization.

63686875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14584 (or 14569 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The square root of 63686875 is about 7980.4056914420. The cubic root of 63686875 is about 399.3465894679.

The spelling of 63686875 in words is "sixty-three million, six hundred eighty-six thousand, eight hundred seventy-five".