13089887 has 4 divisors (see below), whose sum is σ = 13336920. Its totient is φ = 12842856.

The previous prime is 13089863. The next prime is 13089889. The reversal of 13089887 is 78898031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78898031 = 163 ⋅484037.

It is a cyclic number.

It is not a de Polignac number, because 13089887 - 2¹² = 13085791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13089889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123437 + ... + 123542.

It is an arithmetic number, because the mean of its divisors is an integer number (3334230).

Almost surely, 2^13089887 is an apocalyptic number.

13089887 is a deficient number, since it is larger than the sum of its proper divisors (247033).

13089887 is an equidigital number, since it uses as much as digits as its factorization.

13089887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247032.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 13089887 is about 3617.9948866741. The cubic root of 13089887 is about 235.6741589134.

The spelling of 13089887 in words is "thirteen million, eighty-nine thousand, eight hundred eighty-seven".