164919 has 4 divisors (see below), whose sum is σ = 219896. Its totient is φ = 109944.

The previous prime is 164911. The next prime is 164953. The reversal of 164919 is 919461.

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

It is not a de Polignac number, because 164919 - 2³ = 164911 is a prime.

It is a super-2 number, since 2×164919² = 54396553122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164911) 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, 27484 + ... + 27489.

It is an arithmetic number, because the mean of its divisors is an integer number (54974).

2¹⁶⁴⁹¹⁹ is an apocalyptic number.

164919 is a deficient number, since it is larger than the sum of its proper divisors (54977).

164919 is an equidigital number, since it uses as much as digits as its factorization.

164919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54976.

The product of its digits is 1944, while the sum is 30.

The square root of 164919 is about 406.1022038847. The cubic root of 164919 is about 54.8390889173.

The spelling of 164919 in words is "one hundred sixty-four thousand, nine hundred nineteen".