63564689 has 2 divisors, whose sum is σ = 63564690. Its totient is φ = 63564688.

The previous prime is 63564659. The next prime is 63564713. The reversal of 63564689 is 98646536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59985025 + 3579664 = 7745^2 + 1892^2 .

It is a cyclic number.

It is not a de Polignac number, because 63564689 - 2¹² = 63560593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63564619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31782344 + 31782345.

It is an arithmetic number, because the mean of its divisors is an integer number (31782345).

Almost surely, 2^63564689 is an apocalyptic number.

It is an amenable number.

63564689 is a deficient number, since it is larger than the sum of its proper divisors (1).

63564689 is an equidigital number, since it uses as much as digits as its factorization.

63564689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 47.

The square root of 63564689 is about 7972.7466409011. The cubic root of 63564689 is about 399.0910381187.

The spelling of 63564689 in words is "sixty-three million, five hundred sixty-four thousand, six hundred eighty-nine".