64889441 has 2 divisors, whose sum is σ = 64889442. Its totient is φ = 64889440.

The previous prime is 64889423. The next prime is 64889471. The reversal of 64889441 is 14498846.

64889441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42837025 + 22052416 = 6545^2 + 4696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64889441 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64889392 and 64889401.

It is not a weakly prime, because it can be changed into another prime (64889471) by changing a digit.

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 as a sum of consecutive naturals, namely, 32444720 + 32444721.

It is an arithmetic number, because the mean of its divisors is an integer number (32444721).

Almost surely, 2^64889441 is an apocalyptic number.

It is an amenable number.

64889441 is a deficient number, since it is larger than the sum of its proper divisors (1).

64889441 is an equidigital number, since it uses as much as digits as its factorization.

64889441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 44.

The square root of 64889441 is about 8055.3982521040. The cubic root of 64889441 is about 401.8444837097.

The spelling of 64889441 in words is "sixty-four million, eight hundred eighty-nine thousand, four hundred forty-one".