64897684 has 12 divisors (see below), whose sum is σ = 114068500. Its totient is φ = 32306688.

The previous prime is 64897669. The next prime is 64897691. The reversal of 64897684 is 48679846.

It is a happy number.

64897684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 57335184 + 7562500 = 7572^2 + 2750^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34509 + ... + 36340.

Almost surely, 2^64897684 is an apocalyptic number.

It is an amenable number.

64897684 is a deficient number, since it is larger than the sum of its proper divisors (49170816).

64897684 is a wasteful number, since it uses less digits than its factorization.

64897684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71082 (or 71080 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 52.

The square root of 64897684 is about 8055.9098803301. The cubic root of 64897684 is about 401.8614986189.

The spelling of 64897684 in words is "sixty-four million, eight hundred ninety-seven thousand, six hundred eighty-four".