844372889 has 2 divisors, whose sum is σ = 844372890. Its totient is φ = 844372888.

The previous prime is 844372871. The next prime is 844372891. The reversal of 844372889 is 988273448.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810825625 + 33547264 = 28475^2 + 5792^2 .

It is a cyclic number.

It is not a de Polignac number, because 844372889 - 2¹⁶ = 844307353 is a prime.

Together with 844372891, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 844372889.

It is not a weakly prime, because it can be changed into another prime (844372189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422186444 + 422186445.

It is an arithmetic number, because the mean of its divisors is an integer number (422186445).

Almost surely, 2^844372889 is an apocalyptic number.

It is an amenable number.

844372889 is a deficient number, since it is larger than the sum of its proper divisors (1).

844372889 is an equidigital number, since it uses as much as digits as its factorization.

844372889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 53.

The square root of 844372889 is about 29058.0950683282. The cubic root of 844372889 is about 945.1732608792.

The spelling of 844372889 in words is "eight hundred forty-four million, three hundred seventy-two thousand, eight hundred eighty-nine".