164019 has 4 divisors (see below), whose sum is σ = 218696. Its totient is φ = 109344.

The previous prime is 164011. The next prime is 164023. The reversal of 164019 is 910461.

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

It is not a de Polignac number, because 164019 - 2³ = 164011 is a prime.

It is a super-2 number, since 2×164019² = 53804464722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163986 and 164004.

It is not an unprimeable number, because it can be changed into a prime (164011) 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, 27334 + ... + 27339.

It is an arithmetic number, because the mean of its divisors is an integer number (54674).

2¹⁶⁴⁰¹⁹ is an apocalyptic number.

164019 is a deficient number, since it is larger than the sum of its proper divisors (54677).

164019 is an equidigital number, since it uses as much as digits as its factorization.

164019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54676.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 164019 is about 404.9925925249. The cubic root of 164019 is about 54.7391504950.

The spelling of 164019 in words is "one hundred sixty-four thousand, nineteen".