9920987707 has 4 divisors (see below), whose sum is σ = 10017308080. Its totient is φ = 9824667336.

The previous prime is 9920987641. The next prime is 9920987719. The reversal of 9920987707 is 7077890299.

9920987707 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9920987707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9920987777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48160032 + ... + 48160237.

It is an arithmetic number, because the mean of its divisors is an integer number (2504327020).

Almost surely, 2^9920987707 is an apocalyptic number.

9920987707 is a deficient number, since it is larger than the sum of its proper divisors (96320373).

9920987707 is a wasteful number, since it uses less digits than its factorization.

9920987707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96320372.

The product of its (nonzero) digits is 4000752, while the sum is 58.

The square root of 9920987707 is about 99604.1550689528. The cubic root of 9920987707 is about 2148.7454521278.

The spelling of 9920987707 in words is "nine billion, nine hundred twenty million, nine hundred eighty-seven thousand, seven hundred seven".