63959563 has 4 divisors (see below), whose sum is σ = 64592928. Its totient is φ = 63326200.

The previous prime is 63959557. The next prime is 63959579. The reversal of 63959563 is 36595936.

It is a happy number.

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 63959563 - 2⁵ = 63959531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63959503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316531 + ... + 316732.

It is an arithmetic number, because the mean of its divisors is an integer number (16148232).

Almost surely, 2^63959563 is an apocalyptic number.

63959563 is a deficient number, since it is larger than the sum of its proper divisors (633365).

63959563 is a wasteful number, since it uses less digits than its factorization.

63959563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633364.

The product of its digits is 656100, while the sum is 46.

The square root of 63959563 is about 7997.4722881671. The cubic root of 63959563 is about 399.9157385012.

The spelling of 63959563 in words is "sixty-three million, nine hundred fifty-nine thousand, five hundred sixty-three".