64889321 has 12 divisors (see below), whose sum is σ = 75465792. Its totient is φ = 54656184.

The previous prime is 64889291. The next prime is 64889333. The reversal of 64889321 is 12398846.

It is not a de Polignac number, because 64889321 - 2¹⁰ = 64888297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64889521) 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, 23036 + ... + 25698.

It is an arithmetic number, because the mean of its divisors is an integer number (6288816).

Almost surely, 2^64889321 is an apocalyptic number.

It is an amenable number.

64889321 is a deficient number, since it is larger than the sum of its proper divisors (10576471).

64889321 is an equidigital number, since it uses as much as digits as its factorization.

64889321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788 (or 2729 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 64889321 is about 8055.3908036792. The cubic root of 64889321 is about 401.8442359993.

The spelling of 64889321 in words is "sixty-four million, eight hundred eighty-nine thousand, three hundred twenty-one".