986105861 has 8 divisors (see below), whose sum is σ = 1069713624. Its totient is φ = 903605760.

The previous prime is 986105839. The next prime is 986105899. The reversal of 986105861 is 168501689.

It can be written as a sum of positive squares in 4 ways, for example, as 208253761 + 777852100 = 14431^2 + 27890^2 .

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 986105861 - 2¹⁸ = 985843717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986101861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275060 + ... + 278621.

It is an arithmetic number, because the mean of its divisors is an integer number (133714203).

Almost surely, 2^986105861 is an apocalyptic number.

It is an amenable number.

986105861 is a deficient number, since it is larger than the sum of its proper divisors (83607763).

986105861 is a wasteful number, since it uses less digits than its factorization.

986105861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553831.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 986105861 is about 31402.3225414936. The cubic root of 986105861 is about 995.3470035370.

The spelling of 986105861 in words is "nine hundred eighty-six million, one hundred five thousand, eight hundred sixty-one".