44135989 has 2 divisors, whose sum is σ = 44135990. Its totient is φ = 44135988.

The previous prime is 44135983. The next prime is 44136007. The reversal of 44135989 is 98953144.

It is a happy number.

44135989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33443089 + 10692900 = 5783^2 + 3270^2 .

It is a cyclic number.

It is not a de Polignac number, because 44135989 - 2²¹ = 42038837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44135983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22067994 + 22067995.

It is an arithmetic number, because the mean of its divisors is an integer number (22067995).

Almost surely, 2^44135989 is an apocalyptic number.

It is an amenable number.

44135989 is a deficient number, since it is larger than the sum of its proper divisors (1).

44135989 is an equidigital number, since it uses as much as digits as its factorization.

44135989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 44135989 is about 6643.4922292421. The cubic root of 44135989 is about 353.3981629194.

The spelling of 44135989 in words is "forty-four million, one hundred thirty-five thousand, nine hundred eighty-nine".