64449443 has 2 divisors, whose sum is σ = 64449444. Its totient is φ = 64449442.

The previous prime is 64449433. The next prime is 64449467. The reversal of 64449443 is 34494446.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64449443 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64449397 and 64449406.

It is not a weakly prime, because it can be changed into another prime (64449433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32224721 + 32224722.

It is an arithmetic number, because the mean of its divisors is an integer number (32224722).

Almost surely, 2^64449443 is an apocalyptic number.

64449443 is a deficient number, since it is larger than the sum of its proper divisors (1).

64449443 is an equidigital number, since it uses as much as digits as its factorization.

64449443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 38.

The square root of 64449443 is about 8028.0410437416. The cubic root of 64449443 is about 400.9341562652.

The spelling of 64449443 in words is "sixty-four million, four hundred forty-nine thousand, four hundred forty-three".