12713731 has 4 divisors (see below), whose sum is σ = 13023864. Its totient is φ = 12403600.

The previous prime is 12713713. The next prime is 12713741. The reversal of 12713731 is 13731721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12713731 - 2⁹ = 12713219 is a prime.

It is a super-2 number, since 2×12713731² = 323277911880722, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 12713696 and 12713705.

It is not an unprimeable number, because it can be changed into a prime (12713741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155005 + ... + 155086.

It is an arithmetic number, because the mean of its divisors is an integer number (3255966).

Almost surely, 2^12713731 is an apocalyptic number.

12713731 is a deficient number, since it is larger than the sum of its proper divisors (310133).

12713731 is an equidigital number, since it uses as much as digits as its factorization.

12713731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310132.

The product of its digits is 882, while the sum is 25.

The square root of 12713731 is about 3565.6319215533. The cubic root of 12713731 is about 233.3947087978.

The spelling of 12713731 in words is "twelve million, seven hundred thirteen thousand, seven hundred thirty-one".