64889 has 8 divisors (see below), whose sum is σ = 75168. Its totient is φ = 55360.

The previous prime is 64879. The next prime is 64891. The reversal of 64889 is 98846.

64889 = T₄₄ + T₄₅ + ... + T₇₇.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64889 - 2⁸ = 64633 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14 + ... + 360.

It is an arithmetic number, because the mean of its divisors is an integer number (9396).

2⁶⁴⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

64889 is a deficient number, since it is larger than the sum of its proper divisors (10279).

64889 is a wasteful number, since it uses less digits than its factorization.

64889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375.

The product of its digits is 13824, while the sum is 35.

The square root of 64889 is about 254.7331937538. The cubic root of 64889 is about 40.1843573372.

It can be divided in two parts, 648 and 89, that added together give a palindrome (737).

The spelling of 64889 in words is "sixty-four thousand, eight hundred eighty-nine".