11724389 has 4 divisors (see below), whose sum is σ = 11762400. Its totient is φ = 11686380.

The previous prime is 11724371. The next prime is 11724413. The reversal of 11724389 is 98342711.

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 11724389 - 2⁸ = 11724133 is a prime.

It is a super-2 number, since 2×11724389² = 274922594846642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11724359) 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, 18539 + ... + 19160.

It is an arithmetic number, because the mean of its divisors is an integer number (2940600).

Almost surely, 2^11724389 is an apocalyptic number.

It is an amenable number.

11724389 is a deficient number, since it is larger than the sum of its proper divisors (38011).

11724389 is an equidigital number, since it uses as much as digits as its factorization.

11724389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38010.

The product of its digits is 12096, while the sum is 35.

The square root of 11724389 is about 3424.0895140168. The cubic root of 11724389 is about 227.1765011259.

The spelling of 11724389 in words is "eleven million, seven hundred twenty-four thousand, three hundred eighty-nine".