843898481 has 2 divisors, whose sum is σ = 843898482. Its totient is φ = 843898480.

The previous prime is 843898477. The next prime is 843898487. The reversal of 843898481 is 184898348.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625450081 + 218448400 = 25009^2 + 14780^2 .

It is a cyclic number.

It is not a de Polignac number, because 843898481 - 2² = 843898477 is a prime.

It is a super-2 number, since 2×843898481² = 1424329292468214722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (843898487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421949240 + 421949241.

It is an arithmetic number, because the mean of its divisors is an integer number (421949241).

Almost surely, 2^843898481 is an apocalyptic number.

It is an amenable number.

843898481 is a deficient number, since it is larger than the sum of its proper divisors (1).

843898481 is an equidigital number, since it uses as much as digits as its factorization.

843898481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1769472, while the sum is 53.

The square root of 843898481 is about 29049.9308260794. The cubic root of 843898481 is about 944.9962136033.

The spelling of 843898481 in words is "eight hundred forty-three million, eight hundred ninety-eight thousand, four hundred eighty-one".