63978675 has 12 divisors (see below), whose sum is σ = 105778200. Its totient is φ = 34121920.

The previous prime is 63978671. The next prime is 63978683. The reversal of 63978675 is 57687936.

It is not a de Polignac number, because 63978675 - 2² = 63978671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63978671) 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, 426450 + ... + 426599.

It is an arithmetic number, because the mean of its divisors is an integer number (8814850).

Almost surely, 2^63978675 is an apocalyptic number.

63978675 is a deficient number, since it is larger than the sum of its proper divisors (41799525).

63978675 is a wasteful number, since it uses less digits than its factorization.

63978675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853062 (or 853057 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 51.

The square root of 63978675 is about 7998.6670764572. The cubic root of 63978675 is about 399.9555679813.

The spelling of 63978675 in words is "sixty-three million, nine hundred seventy-eight thousand, six hundred seventy-five".