71849543 has 2 divisors, whose sum is σ = 71849544. Its totient is φ = 71849542.

The previous prime is 71849423. The next prime is 71849563. The reversal of 71849543 is 34594817.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71849543 - 2¹² = 71845447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71849543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71849563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35924771 + 35924772.

It is an arithmetic number, because the mean of its divisors is an integer number (35924772).

Almost surely, 2^71849543 is an apocalyptic number.

71849543 is a deficient number, since it is larger than the sum of its proper divisors (1).

71849543 is an equidigital number, since it uses as much as digits as its factorization.

71849543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 71849543 is about 8476.4109739913. The cubic root of 71849543 is about 415.7267818114.

The spelling of 71849543 in words is "seventy-one million, eight hundred forty-nine thousand, five hundred forty-three".