64806589 has 2 divisors, whose sum is σ = 64806590. Its totient is φ = 64806588.

The previous prime is 64806569. The next prime is 64806593. The reversal of 64806589 is 98560846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57608100 + 7198489 = 7590^2 + 2683^2 .

It is a cyclic number.

It is not a de Polignac number, because 64806589 - 2⁵ = 64806557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64806509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32403294 + 32403295.

It is an arithmetic number, because the mean of its divisors is an integer number (32403295).

Almost surely, 2^64806589 is an apocalyptic number.

It is an amenable number.

64806589 is a deficient number, since it is larger than the sum of its proper divisors (1).

64806589 is an equidigital number, since it uses as much as digits as its factorization.

64806589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 64806589 is about 8050.2539711490. The cubic root of 64806589 is about 401.6733834574.

The spelling of 64806589 in words is "sixty-four million, eight hundred six thousand, five hundred eighty-nine".