12731319 has 12 divisors (see below), whose sum is σ = 19024200. Its totient is φ = 8194704.

The previous prime is 12731281. The next prime is 12731339. The reversal of 12731319 is 91313721.

12731319 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12731319 - 2⁸ = 12731063 is a prime.

It is a super-2 number, since 2×12731319² = 324172966959522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12731292 and 12731301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731339) 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, 24129 + ... + 24650.

It is an arithmetic number, because the mean of its divisors is an integer number (1585350).

Almost surely, 2^12731319 is an apocalyptic number.

12731319 is a deficient number, since it is larger than the sum of its proper divisors (6292881).

12731319 is a wasteful number, since it uses less digits than its factorization.

12731319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48814 (or 48811 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 12731319 is about 3568.0973921685. The cubic root of 12731319 is about 233.5022842133.

The spelling of 12731319 in words is "twelve million, seven hundred thirty-one thousand, three hundred nineteen".