7809085 has 4 divisors (see below), whose sum is σ = 9370908. Its totient is φ = 6247264.

The previous prime is 7809083. The next prime is 7809089. The reversal of 7809085 is 5809087.

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 1473796 + 6335289 = 1214^2 + 2517^2 .

It is a cyclic number.

It is not a de Polignac number, because 7809085 - 2¹ = 7809083 is a prime.

It is a Duffinian number.

7809085 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7809083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780904 + ... + 780913.

It is an arithmetic number, because the mean of its divisors is an integer number (2342727).

Almost surely, 2^7809085 is an apocalyptic number.

It is an amenable number.

7809085 is a deficient number, since it is larger than the sum of its proper divisors (1561823).

7809085 is a wasteful number, since it uses less digits than its factorization.

7809085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561822.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 7809085 is about 2794.4740113302. The cubic root of 7809085 is about 198.3962154179.

The spelling of 7809085 in words is "seven million, eight hundred nine thousand, eighty-five".