64086689 has 2 divisors, whose sum is σ = 64086690. Its totient is φ = 64086688.

The previous prime is 64086679. The next prime is 64086691. The reversal of 64086689 is 98668046.

64086689 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., 60217600 + 3869089 = 7760^2 + 1967^2 .

It is a cyclic number.

It is not a de Polignac number, because 64086689 - 2²⁰ = 63038113 is a prime.

It is a Sophie Germain prime.

Together with 64086691, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p_3789893 and since 64086689 and 3789893 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (64086629) 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, 32043344 + 32043345.

It is an arithmetic number, because the mean of its divisors is an integer number (32043345).

Almost surely, 2^64086689 is an apocalyptic number.

It is an amenable number.

64086689 is a deficient number, since it is larger than the sum of its proper divisors (1).

64086689 is an equidigital number, since it uses as much as digits as its factorization.

64086689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 64086689 is about 8005.4162290289. The cubic root of 64086689 is about 400.1805206019.

The spelling of 64086689 in words is "sixty-four million, eighty-six thousand, six hundred eighty-nine".