801819 has 20 divisors (see below), whose sum is σ = 1263240. Its totient is φ = 505440.

The previous prime is 801817. The next prime is 801833. The reversal of 801819 is 918108.

801819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 801819 - 2¹ = 801817 is a prime.

It is a super-2 number, since 2×801819² = 1285827417522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 801792 and 801801.

It is not an unprimeable number, because it can be changed into a prime (801811) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1279 + ... + 1799.

It is an arithmetic number, because the mean of its divisors is an integer number (63162).

2⁸⁰¹⁸¹⁹ is an apocalyptic number.

801819 is a deficient number, since it is larger than the sum of its proper divisors (461421).

801819 is a wasteful number, since it uses less digits than its factorization.

801819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 801819 is about 895.4434655521. The cubic root of 801819 is about 92.9020821642.

The spelling of 801819 in words is "eight hundred one thousand, eight hundred nineteen".