12782831 has 2 divisors, whose sum is σ = 12782832. Its totient is φ = 12782830.

The previous prime is 12782807. The next prime is 12782851. The reversal of 12782831 is 13828721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12782831 - 2⁶ = 12782767 is a prime.

It is a super-2 number, since 2×12782831² = 326801536749122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12782851) 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, 6391415 + 6391416.

It is an arithmetic number, because the mean of its divisors is an integer number (6391416).

Almost surely, 2^12782831 is an apocalyptic number.

12782831 is a deficient number, since it is larger than the sum of its proper divisors (1).

12782831 is an equidigital number, since it uses as much as digits as its factorization.

12782831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 32.

The square root of 12782831 is about 3575.3085181562. The cubic root of 12782831 is about 233.8167838002.

The spelling of 12782831 in words is "twelve million, seven hundred eighty-two thousand, eight hundred thirty-one".