873709805 has 6 divisors (see below), whose sum is σ = 1048531086. Its totient is φ = 698914968.

The previous prime is 873709801. The next prime is 873709807. The reversal of 873709805 is 508907378.

It can be written as a sum of positive squares in only one way, i.e., 698967844 + 174741961 = 26438^2 + 13219^2 .

It is not a de Polignac number, because 873709805 - 2² = 873709801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 873709805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873709801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59486 + ... + 72704.

It is an arithmetic number, because the mean of its divisors is an integer number (174755181).

Almost surely, 2^873709805 is an apocalyptic number.

It is an amenable number.

873709805 is a deficient number, since it is larger than the sum of its proper divisors (174821281).

873709805 is an frugal number, since it uses more digits than its factorization.

873709805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26443 (or 13224 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 873709805 is about 29558.5825945697. The cubic root of 873709805 is about 955.9952545676.

The spelling of 873709805 in words is "eight hundred seventy-three million, seven hundred nine thousand, eight hundred five".