12739523 has 4 divisors (see below), whose sum is σ = 12748440. Its totient is φ = 12730608.

The previous prime is 12739513. The next prime is 12739537. The reversal of 12739523 is 32593721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 32593721 = 19 ⋅1715459.

It is a cyclic number.

It is not a de Polignac number, because 12739523 - 2⁸ = 12739267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12739523.

It is not an unprimeable number, because it can be changed into a prime (12739513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778 + ... + 5351.

It is an arithmetic number, because the mean of its divisors is an integer number (3187110).

Almost surely, 2^12739523 is an apocalyptic number.

12739523 is a deficient number, since it is larger than the sum of its proper divisors (8917).

12739523 is an equidigital number, since it uses as much as digits as its factorization.

12739523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8916.

The product of its digits is 11340, while the sum is 32.

The square root of 12739523 is about 3569.2468393206. The cubic root of 12739523 is about 233.5524293556.

The spelling of 12739523 in words is "twelve million, seven hundred thirty-nine thousand, five hundred twenty-three".