986816861 has 8 divisors (see below), whose sum is σ = 999325824. Its totient is φ = 974386800.

The previous prime is 986816849. The next prime is 986816881. The reversal of 986816861 is 168618689.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-986816861 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 (986816801) 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, 5651 + ... + 44783.

It is an arithmetic number, because the mean of its divisors is an integer number (124915728).

Almost surely, 2^986816861 is an apocalyptic number.

It is an amenable number.

986816861 is a deficient number, since it is larger than the sum of its proper divisors (12508963).

986816861 is a wasteful number, since it uses less digits than its factorization.

986816861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39451.

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

The square root of 986816861 is about 31413.6413202927. The cubic root of 986816861 is about 995.5861670756.

The spelling of 986816861 in words is "nine hundred eighty-six million, eight hundred sixteen thousand, eight hundred sixty-one".