83555543 has 4 divisors (see below), whose sum is σ = 84925368. Its totient is φ = 82185720.

The previous prime is 83555539. The next prime is 83555587. The reversal of 83555543 is 34555538.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83555543 - 2² = 83555539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83555497 and 83555506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83555503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684821 + ... + 684942.

It is an arithmetic number, because the mean of its divisors is an integer number (21231342).

Almost surely, 2^83555543 is an apocalyptic number.

83555543 is a deficient number, since it is larger than the sum of its proper divisors (1369825).

83555543 is a wasteful number, since it uses less digits than its factorization.

83555543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369824.

The product of its digits is 180000, while the sum is 38.

The square root of 83555543 is about 9140.8721137537. The cubic root of 83555543 is about 437.1781238470.

The spelling of 83555543 in words is "eighty-three million, five hundred fifty-five thousand, five hundred forty-three".