12731323 has 4 divisors (see below), whose sum is σ = 13888728. Its totient is φ = 11573920.

The previous prime is 12731281. The next prime is 12731339. The reversal of 12731323 is 32313721.

It is a happy number.

12731323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32313721 = 11 ⋅2937611.

It is a cyclic number.

It is not a de Polignac number, because 12731323 - 2¹³ = 12723131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12731294 and 12731303.

It is not an unprimeable number, because it can be changed into a prime (12731363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578686 + ... + 578707.

It is an arithmetic number, because the mean of its divisors is an integer number (3472182).

Almost surely, 2^12731323 is an apocalyptic number.

12731323 is a deficient number, since it is larger than the sum of its proper divisors (1157405).

12731323 is a wasteful number, since it uses less digits than its factorization.

12731323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157404.

The product of its digits is 756, while the sum is 22.

The square root of 12731323 is about 3568.0979526913. The cubic root of 12731323 is about 233.5023086677.

The spelling of 12731323 in words is "twelve million, seven hundred thirty-one thousand, three hundred twenty-three".