40243244387 has 2 divisors, whose sum is σ = 40243244388. Its totient is φ = 40243244386.

The previous prime is 40243244369. The next prime is 40243244423. The reversal of 40243244387 is 78344234204.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40243244387 - 2⁸ = 40243244131 is a prime.

It is not a weakly prime, because it can be changed into another prime (40243244347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121622193 + 20121622194.

It is an arithmetic number, because the mean of its divisors is an integer number (20121622194).

Almost surely, 2^40243244387 is an apocalyptic number.

40243244387 is a deficient number, since it is larger than the sum of its proper divisors (1).

40243244387 is an equidigital number, since it uses as much as digits as its factorization.

40243244387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 516096, while the sum is 41.

The spelling of 40243244387 in words is "forty billion, two hundred forty-three million, two hundred forty-four thousand, three hundred eighty-seven".