9926785987 has 4 divisors (see below), whose sum is σ = 9926994616. Its totient is φ = 9926577360.

The previous prime is 9926785873. The next prime is 9926785991. The reversal of 9926785987 is 7895876299.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9926785987 - 2⁷ = 9926785859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9926780987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5812 + ... + 141022.

It is an arithmetic number, because the mean of its divisors is an integer number (2481748654).

Almost surely, 2^9926785987 is an apocalyptic number.

9926785987 is a deficient number, since it is larger than the sum of its proper divisors (208629).

9926785987 is a wasteful number, since it uses less digits than its factorization.

9926785987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208628.

The product of its digits is 137168640, while the sum is 70.

The square root of 9926785987 is about 99633.2574344531. The cubic root of 9926785987 is about 2149.1639790502.

The spelling of 9926785987 in words is "nine billion, nine hundred twenty-six million, seven hundred eighty-five thousand, nine hundred eighty-seven".