12489723 has 12 divisors (see below), whose sum is σ = 18128968. Its totient is φ = 8285760.

The previous prime is 12489721. The next prime is 12489727. The reversal of 12489723 is 32798421.

It is not a de Polignac number, because 12489723 - 2¹ = 12489721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12489721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1390 + ... + 5187.

Almost surely, 2^12489723 is an apocalyptic number.

12489723 is a deficient number, since it is larger than the sum of its proper divisors (5639245).

12489723 is a wasteful number, since it uses less digits than its factorization.

12489723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6794 (or 6791 counting only the distinct ones).

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

The square root of 12489723 is about 3534.0802198026. The cubic root of 12489723 is about 232.0158220977.

The spelling of 12489723 in words is "twelve million, four hundred eighty-nine thousand, seven hundred twenty-three".