440023231391 has 2 divisors, whose sum is σ = 440023231392. Its totient is φ = 440023231390.

The previous prime is 440023231247. The next prime is 440023231393. The reversal of 440023231391 is 193132320044.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 440023231391 - 2¹⁸ = 440022969247 is a prime.

Together with 440023231393, 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 (440023231393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220011615695 + 220011615696.

It is an arithmetic number, because the mean of its divisors is an integer number (220011615696).

Almost surely, 2^440023231391 is an apocalyptic number.

440023231391 is a deficient number, since it is larger than the sum of its proper divisors (1).

440023231391 is an equidigital number, since it uses as much as digits as its factorization.

440023231391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 440023231391 in words is "four hundred forty billion, twenty-three million, two hundred thirty-one thousand, three hundred ninety-one".