9906986 has 4 divisors (see below), whose sum is σ = 14860482. Its totient is φ = 4953492.

The previous prime is 9906983. The next prime is 9906991. The reversal of 9906986 is 6896099.

It is a happy number.

9906986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 8814961 + 1092025 = 2969^2 + 1045^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9906986.

It is not an unprimeable number, because it can be changed into a prime (9906983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2476745 + ... + 2476748.

Almost surely, 2^9906986 is an apocalyptic number.

9906986 is a deficient number, since it is larger than the sum of its proper divisors (4953496).

9906986 is a wasteful number, since it uses less digits than its factorization.

9906986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4953495.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 9906986 is about 3147.5364970084. The cubic root of 9906986 is about 214.7734119051.

The spelling of 9906986 in words is "nine million, nine hundred six thousand, nine hundred eighty-six".