63864667 has 4 divisors (see below), whose sum is σ = 63887040. Its totient is φ = 63842296.

The previous prime is 63864659. The next prime is 63864677. The reversal of 63864667 is 76646836.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63864667 - 2³ = 63864659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63864677) 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 3 ways as a sum of consecutive naturals, for example, 6148 + ... + 12865.

It is an arithmetic number, because the mean of its divisors is an integer number (15971760).

Almost surely, 2^63864667 is an apocalyptic number.

63864667 is a deficient number, since it is larger than the sum of its proper divisors (22373).

63864667 is a wasteful number, since it uses less digits than its factorization.

63864667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22372.

The product of its digits is 870912, while the sum is 46.

The square root of 63864667 is about 7991.5372113255. The cubic root of 63864667 is about 399.7178572855.

The spelling of 63864667 in words is "sixty-three million, eight hundred sixty-four thousand, six hundred sixty-seven".