40340543 has 2 divisors, whose sum is σ = 40340544. Its totient is φ = 40340542.

The previous prime is 40340513. The next prime is 40340549. The reversal of 40340543 is 34504304.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40340543 - 2¹² = 40336447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40340549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20170271 + 20170272.

It is an arithmetic number, because the mean of its divisors is an integer number (20170272).

Almost surely, 2^40340543 is an apocalyptic number.

40340543 is a deficient number, since it is larger than the sum of its proper divisors (1).

40340543 is an equidigital number, since it uses as much as digits as its factorization.

40340543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 40340543 is about 6351.4205497668. The cubic root of 40340543 is about 342.9629819491.

Adding to 40340543 its reverse (34504304), we get a palindrome (74844847).

The spelling of 40340543 in words is "forty million, three hundred forty thousand, five hundred forty-three".