9987255827 has 2 divisors, whose sum is σ = 9987255828. Its totient is φ = 9987255826.

The previous prime is 9987255797. The next prime is 9987255851. The reversal of 9987255827 is 7285527899.

It is a happy number.

9987255827 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 9987255827 - 2¹² = 9987251731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9987255827.

It is not a weakly prime, because it can be changed into another prime (9987255877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993627913 + 4993627914.

It is an arithmetic number, because the mean of its divisors is an integer number (4993627914).

Almost surely, 2^9987255827 is an apocalyptic number.

9987255827 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987255827 is an equidigital number, since it uses as much as digits as its factorization.

9987255827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25401600, while the sum is 62.

The square root of 9987255827 is about 99936.2588203101. The cubic root of 9987255827 is about 2153.5190846870.

The spelling of 9987255827 in words is "nine billion, nine hundred eighty-seven million, two hundred fifty-five thousand, eight hundred twenty-seven".