987981061 has 8 divisors (see below), whose sum is σ = 1052763480. Its totient is φ = 923939328.

The previous prime is 987981053. The next prime is 987981073. The reversal of 987981061 is 160189789.

987981061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 279090436 + 708890625 = 16706^2 + 26625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 987981061 - 2³ = 987981053 is a prime.

It is a super-2 number, since 2×987981061² = 1952213153789371442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 987980996 and 987981014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987981011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182416 + ... + 187753.

It is an arithmetic number, because the mean of its divisors is an integer number (131595435).

Almost surely, 2^987981061 is an apocalyptic number.

It is an amenable number.

987981061 is a deficient number, since it is larger than the sum of its proper divisors (64782419).

987981061 is a wasteful number, since it uses less digits than its factorization.

987981061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370343.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 987981061 is about 31432.1660246315. The cubic root of 987981061 is about 995.9775284173.

The spelling of 987981061 in words is "nine hundred eighty-seven million, nine hundred eighty-one thousand, sixty-one".