83940543 has 40 divisors (see below), whose sum is σ = 135698112. Its totient is φ = 51508224.

The previous prime is 83940517. The next prime is 83940551. The reversal of 83940543 is 34504938.

It is not a de Polignac number, because 83940543 - 2¹⁷ = 83809471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83940498 and 83940507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83940503) 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 in 39 ways as a sum of consecutive naturals, for example, 64071 + ... + 65367.

Almost surely, 2^83940543 is an apocalyptic number.

83940543 is a deficient number, since it is larger than the sum of its proper divisors (51757569).

83940543 is a wasteful number, since it uses less digits than its factorization.

83940543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1364 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 83940543 is about 9161.9071704531. The cubic root of 83940543 is about 437.8485590162.

The spelling of 83940543 in words is "eighty-three million, nine hundred forty thousand, five hundred forty-three".