12640623 has 8 divisors (see below), whose sum is σ = 16887168. Its totient is φ = 8410584.

The previous prime is 12640619. The next prime is 12640633. The reversal of 12640623 is 32604621.

12640623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12640623 - 2² = 12640619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12640593 and 12640602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2211 + ... + 5492.

It is an arithmetic number, because the mean of its divisors is an integer number (2110896).

Almost surely, 2^12640623 is an apocalyptic number.

12640623 is a deficient number, since it is larger than the sum of its proper divisors (4246545).

12640623 is an equidigital number, since it uses as much as digits as its factorization.

12640623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8253.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 12640623 is about 3555.3653820669. The cubic root of 12640623 is about 232.9464839301.

The spelling of 12640623 in words is "twelve million, six hundred forty thousand, six hundred twenty-three".