843274981 has 2 divisors, whose sum is σ = 843274982. Its totient is φ = 843274980.

The previous prime is 843274879. The next prime is 843275009. The reversal of 843274981 is 189472348.

843274981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 631717956 + 211557025 = 25134^2 + 14545^2 .

It is a cyclic number.

It is not a de Polignac number, because 843274981 - 2¹⁹ = 842750693 is a prime.

It is a super-2 number, since 2×843274981² = 1422225387161100722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (843271981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421637490 + 421637491.

It is an arithmetic number, because the mean of its divisors is an integer number (421637491).

Almost surely, 2^843274981 is an apocalyptic number.

It is an amenable number.

843274981 is a deficient number, since it is larger than the sum of its proper divisors (1).

843274981 is an equidigital number, since it uses as much as digits as its factorization.

843274981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 46.

The square root of 843274981 is about 29039.1973201740. The cubic root of 843274981 is about 944.7634248181.

The spelling of 843274981 in words is "eight hundred forty-three million, two hundred seventy-four thousand, nine hundred eighty-one".