802779 has 4 divisors (see below), whose sum is σ = 1070376. Its totient is φ = 535184.

The previous prime is 802777. The next prime is 802783. The reversal of 802779 is 977208.

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 802779 - 2¹ = 802777 is a prime.

It is a D-number.

802779 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (802777) 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, 133794 + ... + 133799.

It is an arithmetic number, because the mean of its divisors is an integer number (267594).

2⁸⁰²⁷⁷⁹ is an apocalyptic number.

802779 is a deficient number, since it is larger than the sum of its proper divisors (267597).

802779 is a wasteful number, since it uses less digits than its factorization.

802779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267596.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 802779 is about 895.9793524407. The cubic root of 802779 is about 92.9391439072.

The spelling of 802779 in words is "eight hundred two thousand, seven hundred seventy-nine".