11639823 has 16 divisors (see below), whose sum is σ = 16828896. Its totient is φ = 7113600.

The previous prime is 11639819. The next prime is 11639839. The reversal of 11639823 is 32893611.

11639823 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11639823 - 2² = 11639819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11639813) 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, 5173 + ... + 7073.

It is an arithmetic number, because the mean of its divisors is an integer number (1051806).

Almost surely, 2^11639823 is an apocalyptic number.

11639823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11639823 is a deficient number, since it is larger than the sum of its proper divisors (5189073).

11639823 is a wasteful number, since it uses less digits than its factorization.

11639823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074.

The product of its digits is 7776, while the sum is 33.

The square root of 11639823 is about 3411.7184819384. The cubic root of 11639823 is about 226.6289876335.

The spelling of 11639823 in words is "eleven million, six hundred thirty-nine thousand, eight hundred twenty-three".