844989853 has 2 divisors, whose sum is σ = 844989854. Its totient is φ = 844989852.

The previous prime is 844989841. The next prime is 844989911. The reversal of 844989853 is 358989448.

It is an a-pointer prime, because the next prime (844989911) can be obtained adding 844989853 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 840246169 + 4743684 = 28987^2 + 2178^2 .

It is a cyclic number.

It is not a de Polignac number, because 844989853 - 2²⁵ = 811435421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (844989823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422494926 + 422494927.

It is an arithmetic number, because the mean of its divisors is an integer number (422494927).

Almost surely, 2^844989853 is an apocalyptic number.

It is an amenable number.

844989853 is a deficient number, since it is larger than the sum of its proper divisors (1).

844989853 is an equidigital number, since it uses as much as digits as its factorization.

844989853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 58.

The square root of 844989853 is about 29068.7091732674. The cubic root of 844989853 is about 945.4034103438.

The spelling of 844989853 in words is "eight hundred forty-four million, nine hundred eighty-nine thousand, eight hundred fifty-three".