12011623 has 4 divisors (see below), whose sum is σ = 12935608. Its totient is φ = 11087640.

The previous prime is 12011621. The next prime is 12011641. The reversal of 12011623 is 32611021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12011623 - 2¹ = 12011621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011597 and 12011606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011621) 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 3 ways as a sum of consecutive naturals, for example, 461973 + ... + 461998.

It is an arithmetic number, because the mean of its divisors is an integer number (3233902).

Almost surely, 2^12011623 is an apocalyptic number.

12011623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12011623 is a deficient number, since it is larger than the sum of its proper divisors (923985).

12011623 is an equidigital number, since it uses as much as digits as its factorization.

12011623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923984.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 12011623 is about 3465.7788446466. The cubic root of 12011623 is about 229.0167414011.

Adding to 12011623 its reverse (32611021), we get a palindrome (44622644).

The spelling of 12011623 in words is "twelve million, eleven thousand, six hundred twenty-three".