844945949 has 4 divisors (see below), whose sum is σ = 867782364. Its totient is φ = 822109536.

The previous prime is 844945921. The next prime is 844945961. The reversal of 844945949 is 949549448.

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 449652025 + 395293924 = 21205^2 + 19882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-844945949 is a prime.

It is a super-3 number, since 3×844945949³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 844945894 and 844945903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844945909) 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, 11418152 + ... + 11418225.

It is an arithmetic number, because the mean of its divisors is an integer number (216945591).

Almost surely, 2^844945949 is an apocalyptic number.

It is an amenable number.

844945949 is a deficient number, since it is larger than the sum of its proper divisors (22836415).

844945949 is a wasteful number, since it uses less digits than its factorization.

844945949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22836414.

The product of its digits is 7464960, while the sum is 56.

The square root of 844945949 is about 29067.9539871660. The cubic root of 844945949 is about 945.3870362970.

The spelling of 844945949 in words is "eight hundred forty-four million, nine hundred forty-five thousand, nine hundred forty-nine".