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9986 = 24993
BaseRepresentation
bin10011100000010
3111200212
42130002
5304421
6114122
741054
oct23402
914625
109986
117559
125942
134712
1438d4
152e5b
hex2702

9986 has 4 divisors (see below), whose sum is σ = 14982. Its totient is φ = 4992.

The previous prime is 9973. The next prime is 10007. The reversal of 9986 is 6899.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9025 + 961 = 95^2 + 31^2 .

It is a Curzon number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2495 + ... + 2498.

29986 is an apocalyptic number.

9986 is a deficient number, since it is larger than the sum of its proper divisors (4996).

9986 is a wasteful number, since it uses less digits than its factorization.

9986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4995.

The product of its digits is 3888, while the sum is 32.

The square root of 9986 is about 99.9299754828. The cubic root of 9986 is about 21.5342881762.

The spelling of 9986 in words is "nine thousand, nine hundred eighty-six".

Divisors: 1 2 4993 9986