9998986 has 4 divisors (see below), whose sum is σ = 14998482. Its totient is φ = 4999492.

The previous prime is 9998977. The next prime is 9999047. The reversal of 9998986 is 6898999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6898999 = 71 ⋅97169.

It can be written as a sum of positive squares in only one way, i.e., 7733961 + 2265025 = 2781^2 + 1505^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9998986.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499745 + ... + 2499748.

Almost surely, 2^9998986 is an apocalyptic number.

9998986 is a deficient number, since it is larger than the sum of its proper divisors (4999496).

9998986 is a wasteful number, since it uses less digits than its factorization.

9998986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999495.

The product of its digits is 2519424, while the sum is 58.

The square root of 9998986 is about 3162.1173286265. The cubic root of 9998986 is about 215.4361867678.

The spelling of 9998986 in words is "nine million, nine hundred ninety-eight thousand, nine hundred eighty-six".