11189309 has 4 divisors (see below), whose sum is σ = 11778240. Its totient is φ = 10600380.

The previous prime is 11189303. The next prime is 11189327. The reversal of 11189309 is 90398111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11189309 - 2⁸ = 11189053 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 (11189303) 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, 294437 + ... + 294474.

It is an arithmetic number, because the mean of its divisors is an integer number (2944560).

Almost surely, 2^11189309 is an apocalyptic number.

11189309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11189309 is a deficient number, since it is larger than the sum of its proper divisors (588931).

11189309 is an equidigital number, since it uses as much as digits as its factorization.

11189309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588930.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 11189309 is about 3345.0424511507. The cubic root of 11189309 is about 223.6665758511. Note that the first 3 decimals are identical.

The spelling of 11189309 in words is "eleven million, one hundred eighty-nine thousand, three hundred nine".