40543843 has 2 divisors, whose sum is σ = 40543844. Its totient is φ = 40543842.

The previous prime is 40543801. The next prime is 40543847. The reversal of 40543843 is 34834504.

40543843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40543843 - 2⁹ = 40543331 is a prime.

It is equal to p_2464762 and since 40543843 and 2464762 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40543847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20271921 + 20271922.

It is an arithmetic number, because the mean of its divisors is an integer number (20271922).

Almost surely, 2^40543843 is an apocalyptic number.

40543843 is a deficient number, since it is larger than the sum of its proper divisors (1).

40543843 is an equidigital number, since it uses as much as digits as its factorization.

40543843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 40543843 is about 6367.4047303434. The cubic root of 40543843 is about 343.5381483396.

The spelling of 40543843 in words is "forty million, five hundred forty-three thousand, eight hundred forty-three".