819055 has 4 divisors (see below), whose sum is σ = 982872. Its totient is φ = 655240.

The previous prime is 819037. The next prime is 819061. The reversal of 819055 is 550918.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550918 = 2 ⋅275459.

It is a de Polignac number, because none of the positive numbers 2^k-819055 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81901 + ... + 81910.

It is an arithmetic number, because the mean of its divisors is an integer number (245718).

2⁸¹⁹⁰⁵⁵ is an apocalyptic number.

819055 is a deficient number, since it is larger than the sum of its proper divisors (163817).

819055 is a wasteful number, since it uses less digits than its factorization.

819055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163816.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 819055 is about 905.0165744339. The cubic root of 819055 is about 93.5630466907.

The spelling of 819055 in words is "eight hundred nineteen thousand, fifty-five".