11345209 has 4 divisors (see below), whose sum is σ = 11404800. Its totient is φ = 11285620.

The previous prime is 11345203. The next prime is 11345219. The reversal of 11345209 is 90254311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90254311 = 7 ⋅12893473.

It is a cyclic number.

It is not a de Polignac number, because 11345209 - 2¹¹ = 11343161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11345203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29509 + ... + 29890.

It is an arithmetic number, because the mean of its divisors is an integer number (2851200).

Almost surely, 2^11345209 is an apocalyptic number.

It is an amenable number.

11345209 is a deficient number, since it is larger than the sum of its proper divisors (59591).

11345209 is an equidigital number, since it uses as much as digits as its factorization.

11345209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59590.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 11345209 is about 3368.2649836377. The cubic root of 11345209 is about 224.7005662945.

The spelling of 11345209 in words is "eleven million, three hundred forty-five thousand, two hundred nine".