12689831 has 16 divisors (see below), whose sum is σ = 15993600. Its totient is φ = 9780480.

The previous prime is 12689821. The next prime is 12689857. The reversal of 12689831 is 13898621.

It is a cyclic number.

It is not a de Polignac number, because 12689831 - 2¹⁴ = 12673447 is a prime.

It is a super-2 number, since 2×12689831² = 322063621617122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12689821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6620 + ... + 8318.

It is an arithmetic number, because the mean of its divisors is an integer number (999600).

Almost surely, 2^12689831 is an apocalyptic number.

12689831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12689831 is a deficient number, since it is larger than the sum of its proper divisors (3303769).

12689831 is a wasteful number, since it uses less digits than its factorization.

12689831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814.

The product of its digits is 20736, while the sum is 38.

The square root of 12689831 is about 3562.2789054200. The cubic root of 12689831 is about 233.2483674770.

The spelling of 12689831 in words is "twelve million, six hundred eighty-nine thousand, eight hundred thirty-one".