12711931 has 4 divisors (see below), whose sum is σ = 13381000. Its totient is φ = 12042864.

The previous prime is 12711929. The next prime is 12711943. The reversal of 12711931 is 13911721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13911721 = 61 ⋅228061.

It is a cyclic number.

It is not a de Polignac number, because 12711931 - 2¹ = 12711929 is a prime.

It is a super-2 number, since 2×12711931² = 323186379497522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12711896 and 12711905.

It is not an unprimeable number, because it can be changed into a prime (12711901) 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 3 ways as a sum of consecutive naturals, for example, 334506 + ... + 334543.

It is an arithmetic number, because the mean of its divisors is an integer number (3345250).

Almost surely, 2^12711931 is an apocalyptic number.

12711931 is a deficient number, since it is larger than the sum of its proper divisors (669069).

12711931 is an equidigital number, since it uses as much as digits as its factorization.

12711931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669068.

The product of its digits is 378, while the sum is 25.

The square root of 12711931 is about 3565.3795029421. The cubic root of 12711931 is about 233.3836936651.

The spelling of 12711931 in words is "twelve million, seven hundred eleven thousand, nine hundred thirty-one".