64441943 has 8 divisors (see below), whose sum is σ = 65486880. Its totient is φ = 63400960.

The previous prime is 64441933. The next prime is 64441961. The reversal of 64441943 is 34914446.

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 64441943 - 2⁶ = 64441879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64441933) 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 in 7 ways as a sum of consecutive naturals, for example, 65471 + ... + 66447.

It is an arithmetic number, because the mean of its divisors is an integer number (8185860).

Almost surely, 2^64441943 is an apocalyptic number.

64441943 is a deficient number, since it is larger than the sum of its proper divisors (1044937).

64441943 is an equidigital number, since it uses as much as digits as its factorization.

64441943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977.

The product of its digits is 41472, while the sum is 35.

The square root of 64441943 is about 8027.5739174423. The cubic root of 64441943 is about 400.9186033880.

The spelling of 64441943 in words is "sixty-four million, four hundred forty-one thousand, nine hundred forty-three".