984089681 has 2 divisors, whose sum is σ = 984089682. Its totient is φ = 984089680.

The previous prime is 984089677. The next prime is 984089747. The reversal of 984089681 is 186980489.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 863419456 + 120670225 = 29384^2 + 10985^2 .

It is an emirp because it is prime and its reverse (186980489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 984089681 - 2² = 984089677 is a prime.

It is a super-2 number, since 2×984089681² = 1936865000501363522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (984089611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492044840 + 492044841.

It is an arithmetic number, because the mean of its divisors is an integer number (492044841).

Almost surely, 2^984089681 is an apocalyptic number.

It is an amenable number.

984089681 is a deficient number, since it is larger than the sum of its proper divisors (1).

984089681 is an equidigital number, since it uses as much as digits as its factorization.

984089681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 984089681 is about 31370.2037130778. The cubic root of 984089681 is about 994.6681825811.

The spelling of 984089681 in words is "nine hundred eighty-four million, eighty-nine thousand, six hundred eighty-one".