983982581 has 2 divisors, whose sum is σ = 983982582. Its totient is φ = 983982580.

The previous prime is 983982523. The next prime is 983982611. The reversal of 983982581 is 185289389.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976875025 + 7107556 = 31255^2 + 2666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-983982581 is a prime.

It is a super-2 number, since 2×983982581² = 1936443439422843122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (983982281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491991290 + 491991291.

It is an arithmetic number, because the mean of its divisors is an integer number (491991291).

Almost surely, 2^983982581 is an apocalyptic number.

It is an amenable number.

983982581 is a deficient number, since it is larger than the sum of its proper divisors (1).

983982581 is an equidigital number, since it uses as much as digits as its factorization.

983982581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 53.

The square root of 983982581 is about 31368.4966327684. The cubic root of 983982581 is about 994.6320975138.

The spelling of 983982581 in words is "nine hundred eighty-three million, nine hundred eighty-two thousand, five hundred eighty-one".