64868889 has 8 divisors (see below), whose sum is σ = 91579680. Its totient is φ = 40702016.

The previous prime is 64868879. The next prime is 64868891. The reversal of 64868889 is 98886846.

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 64868889 - 2⁷ = 64868761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64868879) 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, 635919 + ... + 636020.

It is an arithmetic number, because the mean of its divisors is an integer number (11447460).

Almost surely, 2^64868889 is an apocalyptic number.

It is an amenable number.

64868889 is a deficient number, since it is larger than the sum of its proper divisors (26710791).

64868889 is a wasteful number, since it uses less digits than its factorization.

64868889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271959.

The product of its digits is 5308416, while the sum is 57.

The square root of 64868889 is about 8054.1224847900. The cubic root of 64868889 is about 401.8020547220.

The spelling of 64868889 in words is "sixty-four million, eight hundred sixty-eight thousand, eight hundred eighty-nine".