9987891283 has 2 divisors, whose sum is σ = 9987891284. Its totient is φ = 9987891282.

The previous prime is 9987891281. The next prime is 9987891293. The reversal of 9987891283 is 3821987899.

9987891283 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9987891283 - 2¹ = 9987891281 is a prime.

Together with 9987891281, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9987891281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993945641 + 4993945642.

It is an arithmetic number, because the mean of its divisors is an integer number (4993945642).

Almost surely, 2^9987891283 is an apocalyptic number.

9987891283 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987891283 is an equidigital number, since it uses as much as digits as its factorization.

9987891283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 64.

The square root of 9987891283 is about 99939.4380762670. The cubic root of 9987891283 is about 2153.5647574799.

The spelling of 9987891283 in words is "nine billion, nine hundred eighty-seven million, eight hundred ninety-one thousand, two hundred eighty-three".