91066543 has 4 divisors (see below), whose sum is σ = 91122840. Its totient is φ = 91010248.

The previous prime is 91066537. The next prime is 91066553. The reversal of 91066543 is 34566019.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91066543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91066499 and 91066508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91066553) 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, 25648 + ... + 28981.

It is an arithmetic number, because the mean of its divisors is an integer number (22780710).

Almost surely, 2^91066543 is an apocalyptic number.

91066543 is a deficient number, since it is larger than the sum of its proper divisors (56297).

91066543 is a wasteful number, since it uses less digits than its factorization.

91066543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56296.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 91066543 is about 9542.8791776906. The cubic root of 91066543 is about 449.9037539019.

The spelling of 91066543 in words is "ninety-one million, sixty-six thousand, five hundred forty-three".