11109643 has 2 divisors, whose sum is σ = 11109644. Its totient is φ = 11109642.

The previous prime is 11109629. The next prime is 11109671. The reversal of 11109643 is 34690111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11109643 - 2⁵ = 11109611 is a prime.

It is not a weakly prime, because it can be changed into another prime (11109613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5554821 + 5554822.

It is an arithmetic number, because the mean of its divisors is an integer number (5554822).

Almost surely, 2^11109643 is an apocalyptic number.

11109643 is a deficient number, since it is larger than the sum of its proper divisors (1).

11109643 is an equidigital number, since it uses as much as digits as its factorization.

11109643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 11109643 is about 3333.1131093919. The cubic root of 11109643 is about 223.1344882416.

Adding to 11109643 its reverse (34690111), we get a palindrome (45799754).

The spelling of 11109643 in words is "eleven million, one hundred nine thousand, six hundred forty-three".