163687 has 4 divisors (see below), whose sum is σ = 164736. Its totient is φ = 162640.

The previous prime is 163679. The next prime is 163697. The reversal of 163687 is 786361.

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 163687 - 2³ = 163679 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a zygodrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238 + ... + 619.

It is an arithmetic number, because the mean of its divisors is an integer number (41184).

2¹⁶³⁶⁸⁷ is an apocalyptic number.

163687 is a deficient number, since it is larger than the sum of its proper divisors (1049).

163687 is an equidigital number, since it uses as much as digits as its factorization.

163687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048.

The product of its digits is 6048, while the sum is 31.

The square root of 163687 is about 404.5825008574. The cubic root of 163687 is about 54.7021920254.

The spelling of 163687 in words is "one hundred sixty-three thousand, six hundred eighty-seven".