164986 has 4 divisors (see below), whose sum is σ = 247482. Its totient is φ = 82492.

The previous prime is 164963. The next prime is 164987. The reversal of 164986 is 689461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 164025 + 961 = 405^2 + 31^2 .

It is not an unprimeable number, because it can be changed into a prime (164987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41245 + ... + 41248.

2¹⁶⁴⁹⁸⁶ is an apocalyptic number.

164986 is a deficient number, since it is larger than the sum of its proper divisors (82496).

164986 is an equidigital number, since it uses as much as digits as its factorization.

164986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82495.

The product of its digits is 10368, while the sum is 34.

The square root of 164986 is about 406.1846870575. The cubic root of 164986 is about 54.8465142220.

The spelling of 164986 in words is "one hundred sixty-four thousand, nine hundred eighty-six".