844168085 has 4 divisors (see below), whose sum is σ = 1013001708. Its totient is φ = 675334464.

The previous prime is 844168069. The next prime is 844168097. The reversal of 844168085 is 580861448.

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 441042001 + 403126084 = 21001^2 + 20078^2 .

It is a cyclic number.

It is not a de Polignac number, because 844168085 - 2⁴ = 844168069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84416804 + ... + 84416813.

It is an arithmetic number, because the mean of its divisors is an integer number (253250427).

Almost surely, 2^844168085 is an apocalyptic number.

It is an amenable number.

844168085 is a deficient number, since it is larger than the sum of its proper divisors (168833623).

844168085 is a wasteful number, since it uses less digits than its factorization.

844168085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168833622.

The product of its (nonzero) digits is 245760, while the sum is 44.

The square root of 844168085 is about 29054.5708108036. The cubic root of 844168085 is about 945.0968369360.

The spelling of 844168085 in words is "eight hundred forty-four million, one hundred sixty-eight thousand, eighty-five".