12621623 has 4 divisors (see below), whose sum is σ = 14424720. Its totient is φ = 10818528.

The previous prime is 12621611. The next prime is 12621647. The reversal of 12621623 is 32612621.

12621623 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 is not a de Polignac number, because 12621623 - 2⁴ = 12621607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621523) 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, 901538 + ... + 901551.

It is an arithmetic number, because the mean of its divisors is an integer number (3606180).

Almost surely, 2^12621623 is an apocalyptic number.

12621623 is a deficient number, since it is larger than the sum of its proper divisors (1803097).

12621623 is an equidigital number, since it uses as much as digits as its factorization.

12621623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803096.

The product of its digits is 864, while the sum is 23.

The square root of 12621623 is about 3552.6923593241. The cubic root of 12621623 is about 232.8297121908.

The spelling of 12621623 in words is "twelve million, six hundred twenty-one thousand, six hundred twenty-three".