164819 has 4 divisors (see below), whose sum is σ = 168696. Its totient is φ = 160944.

The previous prime is 164809. The next prime is 164821. The reversal of 164819 is 918461.

164819 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: 918461 = 431 ⋅2131.

It is a cyclic number.

It is not a de Polignac number, because 164819 - 2¹² = 160723 is a prime.

It is a super-2 number, since 2×164819² = 54330605522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164791 and 164800.

It is not an unprimeable number, because it can be changed into a prime (164809) 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, 1874 + ... + 1959.

It is an arithmetic number, because the mean of its divisors is an integer number (42174).

2¹⁶⁴⁸¹⁹ is an apocalyptic number.

164819 is a deficient number, since it is larger than the sum of its proper divisors (3877).

164819 is an equidigital number, since it uses as much as digits as its factorization.

164819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876.

The product of its digits is 1728, while the sum is 29.

The square root of 164819 is about 405.9790634996. The cubic root of 164819 is about 54.8280026311.

The spelling of 164819 in words is "one hundred sixty-four thousand, eight hundred nineteen".