244123391 has 2 divisors, whose sum is σ = 244123392. Its totient is φ = 244123390.

The previous prime is 244123387. The next prime is 244123393. The reversal of 244123391 is 193321442.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 244123391 - 2² = 244123387 is a prime.

Together with 244123393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244123393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122061695 + 122061696.

It is an arithmetic number, because the mean of its divisors is an integer number (122061696).

Almost surely, 2^244123391 is an apocalyptic number.

244123391 is a deficient number, since it is larger than the sum of its proper divisors (1).

244123391 is an equidigital number, since it uses as much as digits as its factorization.

244123391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 244123391 is about 15624.4485022672. The cubic root of 244123391 is about 624.9852933073.

The spelling of 244123391 in words is "two hundred forty-four million, one hundred twenty-three thousand, three hundred ninety-one".