164947 has 4 divisors (see below), whose sum is σ = 165816. Its totient is φ = 164080.

The previous prime is 164911. The next prime is 164953. The reversal of 164947 is 749461.

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 a de Polignac number, because none of the positive numbers 2^k-164947 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 not an unprimeable number, because it can be changed into a prime (164987) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13 + ... + 574.

It is an arithmetic number, because the mean of its divisors is an integer number (41454).

2¹⁶⁴⁹⁴⁷ is an apocalyptic number.

164947 is a deficient number, since it is larger than the sum of its proper divisors (869).

164947 is an equidigital number, since it uses as much as digits as its factorization.

164947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868.

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

The square root of 164947 is about 406.1366765019. The cubic root of 164947 is about 54.8421922743.

It can be divided in two parts, 164 and 947, that added together give a palindrome (1111).

The spelling of 164947 in words is "one hundred sixty-four thousand, nine hundred forty-seven".