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164813 = 1114983

164813 has 4 divisors (see below), whose sum is σ = 179808. Its totient is φ = 149820.

The previous prime is 164809. The next prime is 164821. The reversal of 164813 is 318461.

164813 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 164813 - 22 = 164809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164893) 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, 7481 + ... + 7502.

It is an arithmetic number, because the mean of its divisors is an integer number (44952).

2164813 is an apocalyptic number.

It is an amenable number.

164813 is a deficient number, since it is larger than the sum of its proper divisors (14995).

164813 is a wasteful number, since it uses less digits than its factorization.

164813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14994.

The product of its digits is 576, while the sum is 23.

The square root of 164813 is about 405.9716738887. The cubic root of 164813 is about 54.8273373114.

Adding to 164813 its sum of digits (23), we get a square (164836 = 4062).

It can be divided in two parts, 1648 and 13, that added together give a palindrome (1661).

The spelling of 164813 in words is "one hundred sixty-four thousand, eight hundred thirteen".

Divisors: 1 11 14983 164813