12723489 has 27 divisors (see below), whose sum is σ = 19509529. Its totient is φ = 7990080.

The previous prime is 12723481. The next prime is 12723509. The reversal of 12723489 is 98432721.

The square root of 12723489 is 3567.

It is a perfect power (a square), and thus also a powerful number.

12723489 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3359889 + 9363600 = 1833^2 + 3060^2 .

It is not a de Polignac number, because 12723489 - 2³ = 12723481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12723481) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 310309 + ... + 310349.

Almost surely, 2^12723489 is an apocalyptic number.

12723489 is the 3567-th square number.

12723489 is the 1784-th centered octagonal number.

It is an amenable number.

12723489 is a deficient number, since it is larger than the sum of its proper divisors (6786040).

12723489 is an equidigital number, since it uses as much as digits as its factorization.

12723489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 73 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The cubic root of 12723489 is about 233.4544049681.

Multiplying 12723489 by its sum of digits (36), we get a square (458045604 = 21402²).

It can be divided in two parts, 1272 and 3489, that added together give a square (4761 = 69²).

The spelling of 12723489 in words is "twelve million, seven hundred twenty-three thousand, four hundred eighty-nine".