56887 has 4 divisors (see below), whose sum is σ = 57400. Its totient is φ = 56376.

The previous prime is 56873. The next prime is 56891. The reversal of 56887 is 78865.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78865 = 5 ⋅15773.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56887 is a prime.

It is a super-2 number, since 2×56887² = 6472261538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12 + ... + 337.

It is an arithmetic number, because the mean of its divisors is an integer number (14350).

2⁵⁶⁸⁸⁷ is an apocalyptic number.

56887 is a deficient number, since it is larger than the sum of its proper divisors (513).

56887 is a wasteful number, since it uses less digits than its factorization.

56887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512.

The product of its digits is 13440, while the sum is 34.

The square root of 56887 is about 238.5099578634. The cubic root of 56887 is about 38.4595628729.

The spelling of 56887 in words is "fifty-six thousand, eight hundred eighty-seven".