11821623 has 16 divisors (see below), whose sum is σ = 17262336. Its totient is φ = 7136640.

The previous prime is 11821583. The next prime is 11821627. The reversal of 11821623 is 32612811.

11821623 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11821623 - 2⁶ = 11821559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11821593 and 11821602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11821627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10590 + ... + 11652.

It is an arithmetic number, because the mean of its divisors is an integer number (1078896).

Almost surely, 2^11821623 is an apocalyptic number.

11821623 is a deficient number, since it is larger than the sum of its proper divisors (5440713).

11821623 is a wasteful number, since it uses less digits than its factorization.

11821623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414.

The product of its digits is 576, while the sum is 24.

The square root of 11821623 is about 3438.2587162690. The cubic root of 11821623 is about 227.8027880705.

The spelling of 11821623 in words is "eleven million, eight hundred twenty-one thousand, six hundred twenty-three".