844949449 has 4 divisors (see below), whose sum is σ = 849617860. Its totient is φ = 840281040.

The previous prime is 844949431. The next prime is 844949461. The reversal of 844949449 is 944949448.

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 95942025 + 749007424 = 9795^2 + 27368^2 .

It is a cyclic number.

It is not a de Polignac number, because 844949449 - 2¹¹ = 844947401 is a prime.

It is a super-3 number, since 3×844949449³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 844949449.

It is not an unprimeable number, because it can be changed into a prime (844949849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2333934 + ... + 2334295.

It is an arithmetic number, because the mean of its divisors is an integer number (212404465).

Almost surely, 2^844949449 is an apocalyptic number.

It is an amenable number.

844949449 is a deficient number, since it is larger than the sum of its proper divisors (4668411).

844949449 is a wasteful number, since it uses less digits than its factorization.

844949449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4668410.

The product of its digits is 5971968, while the sum is 55.

The square root of 844949449 is about 29068.0141908593. The cubic root of 844949449 is about 945.3883416467.

Subtracting 844949449 from its reverse (944949448), we obtain a palindrome (99999999).

The spelling of 844949449 in words is "eight hundred forty-four million, nine hundred forty-nine thousand, four hundred forty-nine".