44644139 has 2 divisors, whose sum is σ = 44644140. Its totient is φ = 44644138.

The previous prime is 44644109. The next prime is 44644141. The reversal of 44644139 is 93144644.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44644139 is a prime.

It is a Sophie Germain prime.

Together with 44644141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 44644099 and 44644108.

It is not a weakly prime, because it can be changed into another prime (44644109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22322069 + 22322070.

It is an arithmetic number, because the mean of its divisors is an integer number (22322070).

Almost surely, 2^44644139 is an apocalyptic number.

44644139 is a deficient number, since it is larger than the sum of its proper divisors (1).

44644139 is an equidigital number, since it uses as much as digits as its factorization.

44644139 is an evil number, because the sum of its binary digits is even.

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

The square root of 44644139 is about 6681.6269725270. The cubic root of 44644139 is about 354.7492483036.

The spelling of 44644139 in words is "forty-four million, six hundred forty-four thousand, one hundred thirty-nine".