11823817 has 4 divisors (see below), whose sum is σ = 12337920. Its totient is φ = 11309716.

The previous prime is 11823811. The next prime is 11823829. The reversal of 11823817 is 71832811.

It is a happy number.

11823817 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: 71832811 = 2293 ⋅31327.

It is a cyclic number.

It is not a de Polignac number, because 11823817 - 2³ = 11823809 is a prime.

It is a super-4 number, since 4×11823817⁴ (a number of 29 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11823811) 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, 257017 + ... + 257062.

It is an arithmetic number, because the mean of its divisors is an integer number (3084480).

Almost surely, 2^11823817 is an apocalyptic number.

It is an amenable number.

11823817 is a deficient number, since it is larger than the sum of its proper divisors (514103).

11823817 is an equidigital number, since it uses as much as digits as its factorization.

11823817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514102.

The product of its digits is 2688, while the sum is 31.

The square root of 11823817 is about 3438.5777583181. The cubic root of 11823817 is about 227.8168799991.

The spelling of 11823817 in words is "eleven million, eight hundred twenty-three thousand, eight hundred seventeen".