802819 has 4 divisors (see below), whose sum is σ = 804640. Its totient is φ = 801000.

The previous prime is 802811. The next prime is 802829. The reversal of 802819 is 918208.

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

It is a cyclic number.

It is not a de Polignac number, because 802819 - 2³ = 802811 is a prime.

It is a super-2 number, since 2×802819² = 1289036693522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (802811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217 + ... + 1285.

It is an arithmetic number, because the mean of its divisors is an integer number (201160).

2⁸⁰²⁸¹⁹ is an apocalyptic number.

802819 is a deficient number, since it is larger than the sum of its proper divisors (1821).

802819 is a wasteful number, since it uses less digits than its factorization.

802819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 802819 is about 896.0016741056. The cubic root of 802819 is about 92.9406875051.

The spelling of 802819 in words is "eight hundred two thousand, eight hundred nineteen".