11723917 has 4 divisors (see below), whose sum is σ = 12128220. Its totient is φ = 11319616.

The previous prime is 11723911. The next prime is 11723941. The reversal of 11723917 is 71932711.

11723917 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.

It can be written as a sum of positive squares in 2 ways, for example, as 3261636 + 8462281 = 1806^2 + 2909^2 .

It is a cyclic number.

It is not a de Polignac number, because 11723917 - 2¹¹ = 11721869 is a prime.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11723911) 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, 202108 + ... + 202165.

It is an arithmetic number, because the mean of its divisors is an integer number (3032055).

Almost surely, 2^11723917 is an apocalyptic number.

It is an amenable number.

11723917 is a deficient number, since it is larger than the sum of its proper divisors (404303).

11723917 is an equidigital number, since it uses as much as digits as its factorization.

11723917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404302.

The product of its digits is 2646, while the sum is 31.

The square root of 11723917 is about 3424.0205898914. The cubic root of 11723917 is about 227.1734525307.

The spelling of 11723917 in words is "eleven million, seven hundred twenty-three thousand, nine hundred seventeen".