12631831 has 2 divisors, whose sum is σ = 12631832. Its totient is φ = 12631830.

The previous prime is 12631783. The next prime is 12631873. The reversal of 12631831 is 13813621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12631831 is a prime.

It is a super-2 number, since 2×12631831² = 319126308825122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12631796 and 12631805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12631891) 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 as a sum of consecutive naturals, namely, 6315915 + 6315916.

It is an arithmetic number, because the mean of its divisors is an integer number (6315916).

Almost surely, 2^12631831 is an apocalyptic number.

12631831 is a deficient number, since it is larger than the sum of its proper divisors (1).

12631831 is an equidigital number, since it uses as much as digits as its factorization.

12631831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 12631831 is about 3554.1287258624. The cubic root of 12631831 is about 232.8924639000.

The spelling of 12631831 in words is "twelve million, six hundred thirty-one thousand, eight hundred thirty-one".