11116643 has 4 divisors (see below), whose sum is σ = 11257440. Its totient is φ = 10975848.

The previous prime is 11116639. The next prime is 11116649. The reversal of 11116643 is 34661111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34661111 = 19 ⋅1824269.

It is a cyclic number.

It is not a de Polignac number, because 11116643 - 2² = 11116639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11116649) 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, 70280 + ... + 70437.

It is an arithmetic number, because the mean of its divisors is an integer number (2814360).

Almost surely, 2^11116643 is an apocalyptic number.

11116643 is a deficient number, since it is larger than the sum of its proper divisors (140797).

11116643 is an equidigital number, since it uses as much as digits as its factorization.

11116643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140796.

The product of its digits is 432, while the sum is 23.

The square root of 11116643 is about 3334.1630134113. The cubic root of 11116643 is about 223.1813428370.

Adding to 11116643 its reverse (34661111), we get a palindrome (45777754).

The spelling of 11116643 in words is "eleven million, one hundred sixteen thousand, six hundred forty-three".