844856249 has 4 divisors (see below), whose sum is σ = 846226164. Its totient is φ = 843486336.

The previous prime is 844856231. The next prime is 844856251. The reversal of 844856249 is 942658448.

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 62647225 + 782209024 = 7915^2 + 27968^2 .

It is a cyclic number.

It is not a de Polignac number, because 844856249 - 2⁸ = 844855993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 844856197 and 844856206.

It is not an unprimeable number, because it can be changed into a prime (844856279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684032 + ... + 685265.

It is an arithmetic number, because the mean of its divisors is an integer number (211556541).

Almost surely, 2^844856249 is an apocalyptic number.

It is an amenable number.

844856249 is a deficient number, since it is larger than the sum of its proper divisors (1369915).

844856249 is a wasteful number, since it uses less digits than its factorization.

844856249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369914.

The product of its digits is 2211840, while the sum is 50.

The square root of 844856249 is about 29066.4110099613. The cubic root of 844856249 is about 945.3535808164.

The spelling of 844856249 in words is "eight hundred forty-four million, eight hundred fifty-six thousand, two hundred forty-nine".