56987 has 6 divisors (see below), whose sum is σ = 66348. Its totient is φ = 48804.

The previous prime is 56983. The next prime is 56989. The reversal of 56987 is 78965.

It is not a de Polignac number, because 56987 - 2² = 56983 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a zygodrome in base 3.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 56987.

It is not an unprimeable number, because it can be changed into a prime (56983) 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 5 ways as a sum of consecutive naturals, for example, 533 + ... + 630.

It is an arithmetic number, because the mean of its divisors is an integer number (11058).

2⁵⁶⁹⁸⁷ is an apocalyptic number.

56987 is a deficient number, since it is larger than the sum of its proper divisors (9361).

56987 is a wasteful number, since it uses less digits than its factorization.

56987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177 (or 1170 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 56987 is about 238.7195006697. The cubic root of 56987 is about 38.4820853292.

It can be divided in two parts, 569 and 87, that added together give a palindrome (656).

The spelling of 56987 in words is "fifty-six thousand, nine hundred eighty-seven".