64677589 has 2 divisors, whose sum is σ = 64677590. Its totient is φ = 64677588.

The previous prime is 64677551. The next prime is 64677611. The reversal of 64677589 is 98577646.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61105489 + 3572100 = 7817^2 + 1890^2 .

It is a cyclic number.

It is not a de Polignac number, because 64677589 - 2⁹ = 64677077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64677089) 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, 32338794 + 32338795.

It is an arithmetic number, because the mean of its divisors is an integer number (32338795).

Almost surely, 2^64677589 is an apocalyptic number.

It is an amenable number.

64677589 is a deficient number, since it is larger than the sum of its proper divisors (1).

64677589 is an equidigital number, since it uses as much as digits as its factorization.

64677589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 52.

The square root of 64677589 is about 8042.2378104605. The cubic root of 64677589 is about 401.4066910020.

The spelling of 64677589 in words is "sixty-four million, six hundred seventy-seven thousand, five hundred eighty-nine".