44138923 has 2 divisors, whose sum is σ = 44138924. Its totient is φ = 44138922.

The previous prime is 44138921. The next prime is 44138989. The reversal of 44138923 is 32983144.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 44138923 - 2¹ = 44138921 is a prime.

Together with 44138921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (44138921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22069461 + 22069462.

It is an arithmetic number, because the mean of its divisors is an integer number (22069462).

Almost surely, 2^44138923 is an apocalyptic number.

44138923 is a deficient number, since it is larger than the sum of its proper divisors (1).

44138923 is an equidigital number, since it uses as much as digits as its factorization.

44138923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 44138923 is about 6643.7130431710. The cubic root of 44138923 is about 353.4059936207.

The spelling of 44138923 in words is "forty-four million, one hundred thirty-eight thousand, nine hundred twenty-three".