11809229 has 4 divisors (see below), whose sum is σ = 11858880. Its totient is φ = 11759580.

The previous prime is 11809211. The next prime is 11809249. The reversal of 11809229 is 92290811.

It is a happy number.

11809229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 92290811 = 8423 ⋅10957.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11809229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11809195 and 11809204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11809249) 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, 24467 + ... + 24944.

It is an arithmetic number, because the mean of its divisors is an integer number (2964720).

Almost surely, 2^11809229 is an apocalyptic number.

It is an amenable number.

11809229 is a deficient number, since it is larger than the sum of its proper divisors (49651).

11809229 is an equidigital number, since it uses as much as digits as its factorization.

11809229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49650.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 11809229 is about 3436.4558777904. The cubic root of 11809229 is about 227.7231493997.

The spelling of 11809229 in words is "eleven million, eight hundred nine thousand, two hundred twenty-nine".