12749823 has 12 divisors (see below), whose sum is σ = 18515328. Its totient is φ = 8454240.

The previous prime is 12749783. The next prime is 12749827. The reversal of 12749823 is 32894721.

It is not a de Polignac number, because 12749823 - 2⁹ = 12749311 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1990 + ... + 5427.

It is an arithmetic number, because the mean of its divisors is an integer number (1542944).

Almost surely, 2^12749823 is an apocalyptic number.

12749823 is a deficient number, since it is larger than the sum of its proper divisors (5765505).

12749823 is a wasteful number, since it uses less digits than its factorization.

12749823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7614 (or 7611 counting only the distinct ones).

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

The square root of 12749823 is about 3570.6894292279. The cubic root of 12749823 is about 233.6153553642.

The spelling of 12749823 in words is "twelve million, seven hundred forty-nine thousand, eight hundred twenty-three".