844094981 has 2 divisors, whose sum is σ = 844094982. Its totient is φ = 844094980.

The previous prime is 844094929. The next prime is 844095041. The reversal of 844094981 is 189490448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654592225 + 189502756 = 25585^2 + 13766^2 .

It is a cyclic number.

It is not a de Polignac number, because 844094981 - 2¹⁸ = 843832837 is a prime.

It is a super-2 number, since 2×844094981² = 1424992673898780722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (844594981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422047490 + 422047491.

It is an arithmetic number, because the mean of its divisors is an integer number (422047491).

Almost surely, 2^844094981 is an apocalyptic number.

It is an amenable number.

844094981 is a deficient number, since it is larger than the sum of its proper divisors (1).

844094981 is an equidigital number, since it uses as much as digits as its factorization.

844094981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 844094981 is about 29053.3127371045. The cubic root of 844094981 is about 945.0695547099.

The spelling of 844094981 in words is "eight hundred forty-four million, ninety-four thousand, nine hundred eighty-one".