44444639 has 2 divisors, whose sum is σ = 44444640. Its totient is φ = 44444638.

The previous prime is 44444627. The next prime is 44444677. The reversal of 44444639 is 93644444.

It is an a-pointer prime, because the next prime (44444677) can be obtained adding 44444639 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 44444639 - 2⁴ = 44444623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44444839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22222319 + 22222320.

It is an arithmetic number, because the mean of its divisors is an integer number (22222320).

Almost surely, 2^44444639 is an apocalyptic number.

44444639 is a deficient number, since it is larger than the sum of its proper divisors (1).

44444639 is an equidigital number, since it uses as much as digits as its factorization.

44444639 is an evil number, because the sum of its binary digits is even.

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

The square root of 44444639 is about 6666.6812583174. The cubic root of 44444639 is about 354.2200399254.

The spelling of 44444639 in words is "forty-four million, four hundred forty-four thousand, six hundred thirty-nine".