40663543 has 2 divisors, whose sum is σ = 40663544. Its totient is φ = 40663542.

The previous prime is 40663523. The next prime is 40663547. The reversal of 40663543 is 34536604.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40663543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40663547) 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, 20331771 + 20331772.

It is an arithmetic number, because the mean of its divisors is an integer number (20331772).

Almost surely, 2^40663543 is an apocalyptic number.

40663543 is a deficient number, since it is larger than the sum of its proper divisors (1).

40663543 is an equidigital number, since it uses as much as digits as its factorization.

40663543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 40663543 is about 6376.7972368580. The cubic root of 40663543 is about 343.8758988755.

The spelling of 40663543 in words is "forty million, six hundred sixty-three thousand, five hundred forty-three".