64874889 has 12 divisors (see below), whose sum is σ = 94113396. Its totient is φ = 43062912.

The previous prime is 64874851. The next prime is 64874891. The reversal of 64874889 is 98847846.

It can be written as a sum of positive squares in 2 ways, for example, as 10188864 + 54686025 = 3192^2 + 7395^2 .

It is not a de Polignac number, because 64874889 - 2⁸ = 64874633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64874819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13372 + ... + 17565.

It is an arithmetic number, because the mean of its divisors is an integer number (7842783).

Almost surely, 2^64874889 is an apocalyptic number.

It is an amenable number.

64874889 is a deficient number, since it is larger than the sum of its proper divisors (29238507).

64874889 is a wasteful number, since it uses less digits than its factorization.

64874889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31176 (or 31173 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 64874889 is about 8054.4949562341. The cubic root of 64874889 is about 401.8144424682.

The spelling of 64874889 in words is "sixty-four million, eight hundred seventy-four thousand, eight hundred eighty-nine".