844661 has 4 divisors (see below), whose sum is σ = 860652. Its totient is φ = 828672.

The previous prime is 844651. The next prime is 844709. The reversal of 844661 is 166448.

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 600625 + 244036 = 775^2 + 494^2 .

It is a cyclic number.

It is not a de Polignac number, because 844661 - 2¹⁴ = 828277 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 (844601) 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, 7916 + ... + 8021.

It is an arithmetic number, because the mean of its divisors is an integer number (215163).

2⁸⁴⁴⁶⁶¹ is an apocalyptic number.

It is an amenable number.

844661 is a deficient number, since it is larger than the sum of its proper divisors (15991).

844661 is a wasteful number, since it uses less digits than its factorization.

844661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15990.

The product of its digits is 4608, while the sum is 29.

The square root of 844661 is about 919.0544053537. The cubic root of 844661 is about 94.5280750453.

The spelling of 844661 in words is "eight hundred forty-four thousand, six hundred sixty-one".