63568729 has 27 divisors (see below), whose sum is σ = 79742943. Its totient is φ = 50516928.

The previous prime is 63568727. The next prime is 63568733. The reversal of 63568729 is 92786536.

The square root of 63568729 is 7973.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 49491225 + 14077504 = 7035^2 + 3752^2 .

It is not a de Polignac number, because 63568729 - 2¹ = 63568727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63568721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 948754 + ... + 948820.

Almost surely, 2^63568729 is an apocalyptic number.

63568729 is the 7973-rd square number.

63568729 is the 3987-th centered octagonal number.

It is an amenable number.

63568729 is a deficient number, since it is larger than the sum of its proper divisors (16174214).

63568729 is an equidigital number, since it uses as much as digits as its factorization.

63568729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 91 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The cubic root of 63568729 is about 399.0994929891.

The spelling of 63568729 in words is "sixty-three million, five hundred sixty-eight thousand, seven hundred twenty-nine".