164687 has 4 divisors (see below), whose sum is σ = 169176. Its totient is φ = 160200.

The previous prime is 164683. The next prime is 164701. The reversal of 164687 is 786461.

164687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786461 = 13 ⋅60497.

It is a cyclic number.

It is not a de Polignac number, because 164687 - 2² = 164683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164683) 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, 2189 + ... + 2262.

It is an arithmetic number, because the mean of its divisors is an integer number (42294).

2¹⁶⁴⁶⁸⁷ is an apocalyptic number.

164687 is a deficient number, since it is larger than the sum of its proper divisors (4489).

164687 is an equidigital number, since it uses as much as digits as its factorization.

164687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4488.

The product of its digits is 8064, while the sum is 32.

The square root of 164687 is about 405.8164609771. The cubic root of 164687 is about 54.8133618651.

The spelling of 164687 in words is "one hundred sixty-four thousand, six hundred eighty-seven".