40291543 has 2 divisors, whose sum is σ = 40291544. Its totient is φ = 40291542.

The previous prime is 40291541. The next prime is 40291553. The reversal of 40291543 is 34519204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40291543 - 2¹ = 40291541 is a prime.

Together with 40291541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40291541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20145771 + 20145772.

It is an arithmetic number, because the mean of its divisors is an integer number (20145772).

Almost surely, 2^40291543 is an apocalyptic number.

40291543 is a deficient number, since it is larger than the sum of its proper divisors (1).

40291543 is an equidigital number, since it uses as much as digits as its factorization.

40291543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40291543 is about 6347.5619729153. The cubic root of 40291543 is about 342.8240646742.

The spelling of 40291543 in words is "forty million, two hundred ninety-one thousand, five hundred forty-three".