13081887 has 24 divisors (see below), whose sum is σ = 23258144. Its totient is φ = 6899904.

The previous prime is 13081841. The next prime is 13081903. The reversal of 13081887 is 78818031.

It is not a de Polignac number, because 13081887 - 2⁸ = 13081631 is a prime.

It is a super-2 number, since 2×13081887² = 342271534961538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13081807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7168 + ... + 8805.

Almost surely, 2^13081887 is an apocalyptic number.

13081887 is a deficient number, since it is larger than the sum of its proper divisors (10176257).

13081887 is a wasteful number, since it uses less digits than its factorization.

13081887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15999 (or 15996 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 13081887 is about 3616.8891329428. The cubic root of 13081887 is about 235.6261376816.

The spelling of 13081887 in words is "thirteen million, eighty-one thousand, eight hundred eighty-seven".