810019 has 12 divisors (see below), whose sum is σ = 961248. Its totient is φ = 680400.

The previous prime is 810013. The next prime is 810023. The reversal of 810019 is 910018.

It is not a de Polignac number, because 810019 - 2⁷ = 809891 is a prime.

It is a super-2 number, since 2×810019² = 1312261560722, 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 = 809978 and 810005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2854 + ... + 3124.

It is an arithmetic number, because the mean of its divisors is an integer number (80104).

2⁸¹⁰⁰¹⁹ is an apocalyptic number.

810019 is a deficient number, since it is larger than the sum of its proper divisors (151229).

810019 is a wasteful number, since it uses less digits than its factorization.

810019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 810019 is about 900.0105554937. The cubic root of 810019 is about 93.2177040299.

Subtracting from 810019 its sum of digits (19), we obtain a 4-th power (810000 = 30⁴).

Subtracting 810019 from its reverse (910018), we obtain a palindrome (99999).

The spelling of 810019 in words is "eight hundred ten thousand, nineteen".