44140391 has 2 divisors, whose sum is σ = 44140392. Its totient is φ = 44140390.

The previous prime is 44140357. The next prime is 44140417. The reversal of 44140391 is 19304144.

44140391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (44140417) can be obtained adding 44140391 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44140391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 44140391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44140301) 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, 22070195 + 22070196.

It is an arithmetic number, because the mean of its divisors is an integer number (22070196).

Almost surely, 2^44140391 is an apocalyptic number.

44140391 is a deficient number, since it is larger than the sum of its proper divisors (1).

44140391 is an equidigital number, since it uses as much as digits as its factorization.

44140391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 44140391 is about 6643.8235226412. The cubic root of 44140391 is about 353.4099115100.

The spelling of 44140391 in words is "forty-four million, one hundred forty thousand, three hundred ninety-one".