805297879 has 4 divisors (see below), whose sum is σ = 806128200. Its totient is φ = 804467560.

The previous prime is 805297849. The next prime is 805297921. The reversal of 805297879 is 978792508.

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 805297879 - 2¹³ = 805289687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805297849) 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, 413704 + ... + 415645.

It is an arithmetic number, because the mean of its divisors is an integer number (201532050).

Almost surely, 2^805297879 is an apocalyptic number.

805297879 is a deficient number, since it is larger than the sum of its proper divisors (830321).

805297879 is an equidigital number, since it uses as much as digits as its factorization.

805297879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830320.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The square root of 805297879 is about 28377.7708603054. The cubic root of 805297879 is about 930.3624744212.

The spelling of 805297879 in words is "eight hundred five million, two hundred ninety-seven thousand, eight hundred seventy-nine".