63974765 has 16 divisors (see below), whose sum is σ = 78008832. Its totient is φ = 50361024.

The previous prime is 63974747. The next prime is 63974773. The reversal of 63974765 is 56747936.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 63974765 - 2⁸ = 63974509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105092 + ... + 105698.

It is an arithmetic number, because the mean of its divisors is an integer number (4875552).

Almost surely, 2^63974765 is an apocalyptic number.

It is an amenable number.

63974765 is a deficient number, since it is larger than the sum of its proper divisors (14034067).

63974765 is a wasteful number, since it uses less digits than its factorization.

63974765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916.

The product of its digits is 952560, while the sum is 47.

The square root of 63974765 is about 7998.4226569993. The cubic root of 63974765 is about 399.9474201720.

The spelling of 63974765 in words is "sixty-three million, nine hundred seventy-four thousand, seven hundred sixty-five".