11865369 has 4 divisors (see below), whose sum is σ = 15820496. Its totient is φ = 7910244.

The previous prime is 11865361. The next prime is 11865383. The reversal of 11865369 is 96356811.

11865369 is digitally balanced in base 3, 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: 96356811 = 3 ⋅32118937.

It is not a de Polignac number, because 11865369 - 2³ = 11865361 is a prime.

It is a super-2 number, since 2×11865369² = 281573963012322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11865361) 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 3 ways as a sum of consecutive naturals, for example, 1977559 + ... + 1977564.

It is an arithmetic number, because the mean of its divisors is an integer number (3955124).

Almost surely, 2^11865369 is an apocalyptic number.

It is an amenable number.

11865369 is a deficient number, since it is larger than the sum of its proper divisors (3955127).

11865369 is an equidigital number, since it uses as much as digits as its factorization.

11865369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3955126.

The product of its digits is 38880, while the sum is 39.

The square root of 11865369 is about 3444.6144922183. The cubic root of 11865369 is about 228.0834374522.

It can be divided in two parts, 1186 and 5369, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 11865369 in words is "eleven million, eight hundred sixty-five thousand, three hundred sixty-nine".