12835991 has 6 divisors (see below), whose sum is σ = 14931720. Its totient is φ = 11002236.

The previous prime is 12835961. The next prime is 12836023. The reversal of 12835991 is 19953821.

It is not a de Polignac number, because 12835991 - 2¹⁴ = 12819607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12835931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 130931 + ... + 131028.

It is an arithmetic number, because the mean of its divisors is an integer number (2488620).

Almost surely, 2^12835991 is an apocalyptic number.

12835991 is a deficient number, since it is larger than the sum of its proper divisors (2095729).

12835991 is an equidigital number, since it uses as much as digits as its factorization.

12835991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261973 (or 261966 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The square root of 12835991 is about 3582.7351283621. The cubic root of 12835991 is about 234.1404603903.

The spelling of 12835991 in words is "twelve million, eight hundred thirty-five thousand, nine hundred ninety-one".