9973810786 has 4 divisors (see below), whose sum is σ = 14960716182. Its totient is φ = 4986905392.

The previous prime is 9973810783. The next prime is 9973810817. The reversal of 9973810786 is 6870183799.

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., 9735571561 + 238239225 = 98669^2 + 15435^2 .

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 9973810786.

It is not an unprimeable number, because it can be changed into a prime (9973810783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2493452695 + ... + 2493452698.

Almost surely, 2^9973810786 is an apocalyptic number.

9973810786 is a deficient number, since it is larger than the sum of its proper divisors (4986905396).

9973810786 is a wasteful number, since it uses less digits than its factorization.

9973810786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4986905395.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The square root of 9973810786 is about 99868.9680831839. The cubic root of 9973810786 is about 2152.5522807421.

The spelling of 9973810786 in words is "nine billion, nine hundred seventy-three million, eight hundred ten thousand, seven hundred eighty-six".