64732889 has 8 divisors (see below), whose sum is σ = 73813320. Its totient is φ = 56238336.

The previous prime is 64732883. The next prime is 64732897. The reversal of 64732889 is 98823746.

It can be written as a sum of positive squares in 4 ways, for example, as 652864 + 64080025 = 808^2 + 8005^2 .

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 64732889 - 2¹² = 64728793 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64732883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146234 + ... + 146675.

It is an arithmetic number, because the mean of its divisors is an integer number (9226665).

Almost surely, 2^64732889 is an apocalyptic number.

It is an amenable number.

64732889 is a deficient number, since it is larger than the sum of its proper divisors (9080431).

64732889 is a wasteful number, since it uses less digits than its factorization.

64732889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292939.

The product of its digits is 580608, while the sum is 47.

The square root of 64732889 is about 8045.6751736570. The cubic root of 64732889 is about 401.5210606877.

The spelling of 64732889 in words is "sixty-four million, seven hundred thirty-two thousand, eight hundred eighty-nine".