11209239 has 16 divisors (see below), whose sum is σ = 17583840. Its totient is φ = 7032960.

The previous prime is 11209199. The next prime is 11209243. The reversal of 11209239 is 93290211.

It is not a de Polignac number, because 11209239 - 2¹⁷ = 11078167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11209249) 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 15 ways as a sum of consecutive naturals, for example, 11752 + ... + 12669.

It is an arithmetic number, because the mean of its divisors is an integer number (1098990).

Almost surely, 2^11209239 is an apocalyptic number.

11209239 is a deficient number, since it is larger than the sum of its proper divisors (6374601).

11209239 is a wasteful number, since it uses less digits than its factorization.

11209239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24447 (or 24441 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 11209239 is about 3348.0201612296. The cubic root of 11209239 is about 223.7992927405.

The spelling of 11209239 in words is "eleven million, two hundred nine thousand, two hundred thirty-nine".