64553689 has 2 divisors, whose sum is σ = 64553690. Its totient is φ = 64553688.

The previous prime is 64553647. The next prime is 64553711. The reversal of 64553689 is 98635546.

64553689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64320400 + 233289 = 8020^2 + 483^2 .

It is a cyclic number.

It is not a de Polignac number, because 64553689 - 2⁷ = 64553561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64551689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32276844 + 32276845.

It is an arithmetic number, because the mean of its divisors is an integer number (32276845).

Almost surely, 2^64553689 is an apocalyptic number.

It is an amenable number.

64553689 is a deficient number, since it is larger than the sum of its proper divisors (1).

64553689 is an equidigital number, since it uses as much as digits as its factorization.

64553689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 46.

The square root of 64553689 is about 8034.5310379636. The cubic root of 64553689 is about 401.1502081329.

The spelling of 64553689 in words is "sixty-four million, five hundred fifty-three thousand, six hundred eighty-nine".