844889087 has 4 divisors (see below), whose sum is σ = 965587536. Its totient is φ = 724190640.

The previous prime is 844889077. The next prime is 844889119. The reversal of 844889087 is 780988448.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 844889087 - 2¹⁰ = 844888063 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 (844889047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60349214 + ... + 60349227.

It is an arithmetic number, because the mean of its divisors is an integer number (241396884).

Almost surely, 2^844889087 is an apocalyptic number.

844889087 is a deficient number, since it is larger than the sum of its proper divisors (120698449).

844889087 is a wasteful number, since it uses less digits than its factorization.

844889087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120698448.

The product of its (nonzero) digits is 4128768, while the sum is 56.

The square root of 844889087 is about 29066.9758832941. The cubic root of 844889087 is about 945.3658287062.

The spelling of 844889087 in words is "eight hundred forty-four million, eight hundred eighty-nine thousand, eighty-seven".