987082981 has 2 divisors, whose sum is σ = 987082982. Its totient is φ = 987082980.

The previous prime is 987082979. The next prime is 987082991. The reversal of 987082981 is 189280789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 741690756 + 245392225 = 27234^2 + 15665^2 .

It is a cyclic number.

It is not a de Polignac number, because 987082981 - 2¹ = 987082979 is a prime.

It is a super-2 number, since 2×987082981² = 1948665622759692722, which contains 22 as substring.

Together with 987082979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987082991) by changing a digit.

It is a nontrivial repunit in base 177.

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, 493541490 + 493541491.

It is an arithmetic number, because the mean of its divisors is an integer number (493541491).

Almost surely, 2^987082981 is an apocalyptic number.

It is an amenable number.

987082981 is a deficient number, since it is larger than the sum of its proper divisors (1).

987082981 is an equidigital number, since it uses as much as digits as its factorization.

987082981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 52.

The square root of 987082981 is about 31417.8767742188. The cubic root of 987082981 is about 995.6756539866.

The spelling of 987082981 in words is "nine hundred eighty-seven million, eighty-two thousand, nine hundred eighty-one".