68987 has 4 divisors (see below), whose sum is σ = 69600. Its totient is φ = 68376.

The previous prime is 68963. The next prime is 68993. The reversal of 68987 is 78986.

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.

It is a cyclic number.

It is not a de Polignac number, because 68987 - 2¹² = 64891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68987.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 68987.

It is not an unprimeable number, because it can be changed into a prime (68917) 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, 83 + ... + 380.

It is an arithmetic number, because the mean of its divisors is an integer number (17400).

2⁶⁸⁹⁸⁷ is an apocalyptic number.

68987 is a deficient number, since it is larger than the sum of its proper divisors (613).

68987 is a wasteful number, since it uses less digits than its factorization.

68987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612.

The product of its digits is 24192, while the sum is 38.

The square root of 68987 is about 262.6537644885. The cubic root of 68987 is about 41.0130832726.

Subtracting 68987 from its reverse (78986), we obtain a palindrome (9999).

The spelling of 68987 in words is "sixty-eight thousand, nine hundred eighty-seven".