13087887 has 4 divisors (see below), whose sum is σ = 17450520. Its totient is φ = 8725256.

The previous prime is 13087871. The next prime is 13087913. The reversal of 13087887 is 78878031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78878031 = 3 ⋅26292677.

It is a cyclic number.

It is not a de Polignac number, because 13087887 - 2⁴ = 13087871 is a prime.

It is a super-2 number, since 2×13087887² = 342585572249538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13087387) 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, 2181312 + ... + 2181317.

It is an arithmetic number, because the mean of its divisors is an integer number (4362630).

Almost surely, 2^13087887 is an apocalyptic number.

13087887 is a deficient number, since it is larger than the sum of its proper divisors (4362633).

13087887 is an equidigital number, since it uses as much as digits as its factorization.

13087887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4362632.

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 13087887 is about 3617.7184799263. The cubic root of 13087887 is about 235.6621554402.

The spelling of 13087887 in words is "thirteen million, eighty-seven thousand, eight hundred eighty-seven".