164690 has 16 divisors (see below), whose sum is σ = 304128. Its totient is φ = 64176.

The previous prime is 164683. The next prime is 164701. The reversal of 164690 is 96461.

It is a super-2 number, since 2×164690² = 54245592200, which contains 22 as substring.

It is an unprimeable number.

164690 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (19008).

2¹⁶⁴⁶⁹⁰ is an apocalyptic number.

164690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164690 is a deficient number, since it is larger than the sum of its proper divisors (139438).

164690 is a wasteful number, since it uses less digits than its factorization.

164690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 164690 is about 405.8201572125. The cubic root of 164690 is about 54.8136946966.

The spelling of 164690 in words is "one hundred sixty-four thousand, six hundred ninety".