12739831 has 4 divisors (see below), whose sum is σ = 13719832. Its totient is φ = 11759832.

The previous prime is 12739819. The next prime is 12739841. The reversal of 12739831 is 13893721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13893721 = 1151 ⋅12071.

It is a cyclic number.

It is not a de Polignac number, because 12739831 - 2⁵ = 12739799 is a prime.

It is a super-2 number, since 2×12739831² = 324606587817122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739801) 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, 489981 + ... + 490006.

It is an arithmetic number, because the mean of its divisors is an integer number (3429958).

Almost surely, 2^12739831 is an apocalyptic number.

12739831 is a deficient number, since it is larger than the sum of its proper divisors (980001).

12739831 is an equidigital number, since it uses as much as digits as its factorization.

12739831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980000.

The product of its digits is 9072, while the sum is 34.

The square root of 12739831 is about 3569.2899854173. The cubic root of 12739831 is about 233.5543115184.

The spelling of 12739831 in words is "twelve million, seven hundred thirty-nine thousand, eight hundred thirty-one".