11523289 has 4 divisors (see below), whose sum is σ = 11895040. Its totient is φ = 11151540.

The previous prime is 11523283. The next prime is 11523293. The reversal of 11523289 is 98232511.

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 11523289 - 2¹⁷ = 11392217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 371719 = 11523289 / (1 + 1 + 5 + 2 + 3 + 2 + 8 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11523289.

It is not an unprimeable number, because it can be changed into a prime (11523283) 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, 185829 + ... + 185890.

It is an arithmetic number, because the mean of its divisors is an integer number (2973760).

Almost surely, 2^11523289 is an apocalyptic number.

It is an amenable number.

11523289 is a deficient number, since it is larger than the sum of its proper divisors (371751).

11523289 is an equidigital number, since it uses as much as digits as its factorization.

11523289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371750.

The product of its digits is 4320, while the sum is 31.

The square root of 11523289 is about 3394.5970305767. The cubic root of 11523289 is about 225.8701384106.

The spelling of 11523289 in words is "eleven million, five hundred twenty-three thousand, two hundred eighty-nine".