9935986 has 4 divisors (see below), whose sum is σ = 14903982. Its totient is φ = 4967992.

The previous prime is 9935969. The next prime is 9935987. The reversal of 9935986 is 6895399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6895399 = 7 ⋅985057.

It can be written as a sum of positive squares in only one way, i.e., 5377761 + 4558225 = 2319^2 + 2135^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (9935987) 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 as a sum of consecutive naturals, namely, 2483995 + ... + 2483998.

Almost surely, 2^9935986 is an apocalyptic number.

9935986 is a deficient number, since it is larger than the sum of its proper divisors (4967996).

9935986 is a wasteful number, since it uses less digits than its factorization.

9935986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4967995.

The product of its digits is 524880, while the sum is 49.

The square root of 9935986 is about 3152.1399080625. The cubic root of 9935986 is about 214.9827712894.

The spelling of 9935986 in words is "nine million, nine hundred thirty-five thousand, nine hundred eighty-six".