802085891 has 4 divisors (see below), whose sum is σ = 849267432. Its totient is φ = 754904352.

The previous prime is 802085887. The next prime is 802085917. The reversal of 802085891 is 198580208.

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 802085891 - 2² = 802085887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (802085861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23590745 + ... + 23590778.

It is an arithmetic number, because the mean of its divisors is an integer number (212316858).

Almost surely, 2^802085891 is an apocalyptic number.

802085891 is a deficient number, since it is larger than the sum of its proper divisors (47181541).

802085891 is a wasteful number, since it uses less digits than its factorization.

802085891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47181540.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 802085891 is about 28321.1209347370. The cubic root of 802085891 is about 929.1238872093.

The spelling of 802085891 in words is "eight hundred two million, eighty-five thousand, eight hundred ninety-one".