64244443 has 4 divisors (see below), whose sum is σ = 64265608. Its totient is φ = 64223280.

The previous prime is 64244423. The next prime is 64244461. The reversal of 64244443 is 34444246.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64244443 - 2⁹ = 64243931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64244423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5073 + ... + 12418.

It is an arithmetic number, because the mean of its divisors is an integer number (16066402).

Almost surely, 2^64244443 is an apocalyptic number.

64244443 is a deficient number, since it is larger than the sum of its proper divisors (21165).

64244443 is a wasteful number, since it uses less digits than its factorization.

64244443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21164.

The product of its digits is 36864, while the sum is 31.

The square root of 64244443 is about 8015.2631273090. The cubic root of 64244443 is about 400.5086092674.

Adding to 64244443 its reverse (34444246), we get a palindrome (98688689).

The spelling of 64244443 in words is "sixty-four million, two hundred forty-four thousand, four hundred forty-three".