64000889 has 4 divisors (see below), whose sum is σ = 64027380. Its totient is φ = 63974400.

The previous prime is 64000837. The next prime is 64000907. The reversal of 64000889 is 98800046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21529600 + 42471289 = 4640^2 + 6517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64000889 is a prime.

It is a super-2 number, since 2×64000889² = 8192227585580642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64000819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9212 + ... + 14589.

It is an arithmetic number, because the mean of its divisors is an integer number (16006845).

Almost surely, 2^64000889 is an apocalyptic number.

It is an amenable number.

64000889 is a deficient number, since it is larger than the sum of its proper divisors (26491).

64000889 is a wasteful number, since it uses less digits than its factorization.

64000889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26490.

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

The square root of 64000889 is about 8000.0555623071. The cubic root of 64000889 is about 400.0018520748.

The spelling of 64000889 in words is "sixty-four million, eight hundred eighty-nine", and thus it is an aban number.