64593889 has 2 divisors, whose sum is σ = 64593890. Its totient is φ = 64593888.

The previous prime is 64593887. The next prime is 64593911. The reversal of 64593889 is 98839546.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60964864 + 3629025 = 7808^2 + 1905^2 .

It is a cyclic number.

It is not a de Polignac number, because 64593889 - 2¹ = 64593887 is a prime.

It is a super-2 number, since 2×64593889² = 8344740992288642, which contains 22 as substring.

Together with 64593887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64593887) 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 as a sum of consecutive naturals, namely, 32296944 + 32296945.

It is an arithmetic number, because the mean of its divisors is an integer number (32296945).

Almost surely, 2^64593889 is an apocalyptic number.

It is an amenable number.

64593889 is a deficient number, since it is larger than the sum of its proper divisors (1).

64593889 is an equidigital number, since it uses as much as digits as its factorization.

64593889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 52.

The square root of 64593889 is about 8037.0323503144. The cubic root of 64593889 is about 401.2334612736.

The spelling of 64593889 in words is "sixty-four million, five hundred ninety-three thousand, eight hundred eighty-nine".