44136643 has 2 divisors, whose sum is σ = 44136644. Its totient is φ = 44136642.

The previous prime is 44136583. The next prime is 44136679. The reversal of 44136643 is 34663144.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44136643 is a prime.

It is not a weakly prime, because it can be changed into another prime (44136683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22068321 + 22068322.

It is an arithmetic number, because the mean of its divisors is an integer number (22068322).

Almost surely, 2^44136643 is an apocalyptic number.

44136643 is a deficient number, since it is larger than the sum of its proper divisors (1).

44136643 is an equidigital number, since it uses as much as digits as its factorization.

44136643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 31.

The square root of 44136643 is about 6643.5414501604. The cubic root of 44136643 is about 353.3999084432.

Adding to 44136643 its reverse (34663144), we get a palindrome (78799787).

The spelling of 44136643 in words is "forty-four million, one hundred thirty-six thousand, six hundred forty-three".