10985543 has 4 divisors (see below), whose sum is σ = 11025480. Its totient is φ = 10945608.

The previous prime is 10985539. The next prime is 10985549. The reversal of 10985543 is 34558901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34558901 = 13 ⋅2658377.

It is a cyclic number.

It is not a de Polignac number, because 10985543 - 2² = 10985539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10985549) 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 in 3 ways as a sum of consecutive naturals, for example, 19553 + ... + 20106.

It is an arithmetic number, because the mean of its divisors is an integer number (2756370).

Almost surely, 2^10985543 is an apocalyptic number.

10985543 is a deficient number, since it is larger than the sum of its proper divisors (39937).

10985543 is an equidigital number, since it uses as much as digits as its factorization.

10985543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39936.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 10985543 is about 3314.4445990241. Note that the first 3 decimals coincide. The cubic root of 10985543 is about 222.3005357963.

The spelling of 10985543 in words is "ten million, nine hundred eighty-five thousand, five hundred forty-three".