844821089 has 4 divisors (see below), whose sum is σ = 965509824. Its totient is φ = 724132356.

The previous prime is 844821067. The next prime is 844821143. The reversal of 844821089 is 980128448.

It is a happy number.

844821089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 844821089 - 2⁸ = 844820833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (844827089) 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, 60344357 + ... + 60344370.

It is an arithmetic number, because the mean of its divisors is an integer number (241377456).

Almost surely, 2^844821089 is an apocalyptic number.

It is an amenable number.

844821089 is a deficient number, since it is larger than the sum of its proper divisors (120688735).

844821089 is a wasteful number, since it uses less digits than its factorization.

844821089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120688734.

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 844821089 is about 29065.8061818350. The cubic root of 844821089 is about 945.3404665172.

The spelling of 844821089 in words is "eight hundred forty-four million, eight hundred twenty-one thousand, eighty-nine".