13086891 has 6 divisors (see below), whose sum is σ = 18903300. Its totient is φ = 8724588.

The previous prime is 13086883. The next prime is 13086893. The reversal of 13086891 is 19868031.

It is not a de Polignac number, because 13086891 - 2³ = 13086883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13086893) 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 5 ways as a sum of consecutive naturals, for example, 727041 + ... + 727058.

It is an arithmetic number, because the mean of its divisors is an integer number (3150550).

Almost surely, 2^13086891 is an apocalyptic number.

13086891 is a deficient number, since it is larger than the sum of its proper divisors (5816409).

13086891 is a wasteful number, since it uses less digits than its factorization.

13086891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454105 (or 1454102 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 13086891 is about 3617.5808214883. The cubic root of 13086891 is about 235.6561772544.

The spelling of 13086891 in words is "thirteen million, eighty-six thousand, eight hundred ninety-one".