9987442807 has 2 divisors, whose sum is σ = 9987442808. Its totient is φ = 9987442806.

The previous prime is 9987442799. The next prime is 9987442811. The reversal of 9987442807 is 7082447899.

9987442807 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9987442807 - 2³ = 9987442799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9987442307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993721403 + 4993721404.

It is an arithmetic number, because the mean of its divisors is an integer number (4993721404).

Almost surely, 2^9987442807 is an apocalyptic number.

9987442807 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987442807 is an equidigital number, since it uses as much as digits as its factorization.

9987442807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The square root of 9987442807 is about 99937.1943122279. The cubic root of 9987442807 is about 2153.5325238970.

The spelling of 9987442807 in words is "nine billion, nine hundred eighty-seven million, four hundred forty-two thousand, eight hundred seven".