64733889 has 8 divisors (see below), whose sum is σ = 94158432. Its totient is φ = 39232640.

The previous prime is 64733873. The next prime is 64733897. The reversal of 64733889 is 98833746.

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 64733889 - 2⁴ = 64733873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64733839) 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, 980784 + ... + 980849.

It is an arithmetic number, because the mean of its divisors is an integer number (11769804).

Almost surely, 2^64733889 is an apocalyptic number.

It is an amenable number.

64733889 is a deficient number, since it is larger than the sum of its proper divisors (29424543).

64733889 is a wasteful number, since it uses less digits than its factorization.

64733889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961647.

The product of its digits is 870912, while the sum is 48.

The square root of 64733889 is about 8045.7373186054. The cubic root of 64733889 is about 401.5231282559.

The spelling of 64733889 in words is "sixty-four million, seven hundred thirty-three thousand, eight hundred eighty-nine".