9943109986 has 4 divisors (see below), whose sum is σ = 14914664982. Its totient is φ = 4971554992.

The previous prime is 9943109959. The next prime is 9943110017. The reversal of 9943109986 is 6899013499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6899013499 = 7 ⋅985573357.

It can be written as a sum of positive squares in only one way, i.e., 6094768761 + 3848341225 = 78069^2 + 62035^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 9943109986.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2485777495 + ... + 2485777498.

Almost surely, 2^9943109986 is an apocalyptic number.

9943109986 is a deficient number, since it is larger than the sum of its proper divisors (4971554996).

9943109986 is a wasteful number, since it uses less digits than its factorization.

9943109986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4971554995.

The product of its (nonzero) digits is 3779136, while the sum is 58.

The square root of 9943109986 is about 99715.1442159114. The cubic root of 9943109986 is about 2150.3413906060.

The spelling of 9943109986 in words is "nine billion, nine hundred forty-three million, one hundred nine thousand, nine hundred eighty-six".