805175089 has 4 divisors (see below), whose sum is σ = 808308324. Its totient is φ = 802041856.

The previous prime is 805175083. The next prime is 805175101. The reversal of 805175089 is 980571508.

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

It can be written as a sum of positive squares in 2 ways, for example, as 738915489 + 66259600 = 27183^2 + 8140^2 .

It is a cyclic number.

It is not a de Polignac number, because 805175089 - 2³ = 805175081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805175081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566232 + ... + 1566745.

It is an arithmetic number, because the mean of its divisors is an integer number (202077081).

Almost surely, 2^805175089 is an apocalyptic number.

It is an amenable number.

805175089 is a deficient number, since it is larger than the sum of its proper divisors (3133235).

805175089 is a wasteful number, since it uses less digits than its factorization.

805175089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133234.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 805175089 is about 28375.6072886555. The cubic root of 805175089 is about 930.3151854954.

The spelling of 805175089 in words is "eight hundred five million, one hundred seventy-five thousand, eighty-nine".