11811723 has 16 divisors (see below), whose sum is σ = 19635456. Its totient is φ = 6135840.

The previous prime is 11811721. The next prime is 11811763. The reversal of 11811723 is 32711811.

It is a happy number.

It is not a de Polignac number, because 11811723 - 2¹ = 11811721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11811693 and 11811702.

It is not an unprimeable number, because it can be changed into a prime (11811721) 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 15 ways as a sum of consecutive naturals, for example, 25336 + ... + 25797.

It is an arithmetic number, because the mean of its divisors is an integer number (1227216).

Almost surely, 2^11811723 is an apocalyptic number.

11811723 is a deficient number, since it is larger than the sum of its proper divisors (7823733).

11811723 is a wasteful number, since it uses less digits than its factorization.

11811723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51154.

The product of its digits is 336, while the sum is 24.

The square root of 11811723 is about 3436.8187324908. The cubic root of 11811723 is about 227.7391792793.

The spelling of 11811723 in words is "eleven million, eight hundred eleven thousand, seven hundred twenty-three".