9927280387 has 2 divisors, whose sum is σ = 9927280388. Its totient is φ = 9927280386.

The previous prime is 9927280367. The next prime is 9927280397. The reversal of 9927280387 is 7830827299.

9927280387 is digitally balanced in base 2, 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 a de Polignac number, because none of the positive numbers 2^k-9927280387 is a prime.

It is a super-2 number, since 2×9927280387² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9927280327) 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 as a sum of consecutive naturals, namely, 4963640193 + 4963640194.

It is an arithmetic number, because the mean of its divisors is an integer number (4963640194).

Almost surely, 2^9927280387 is an apocalyptic number.

9927280387 is a deficient number, since it is larger than the sum of its proper divisors (1).

9927280387 is an equidigital number, since it uses as much as digits as its factorization.

9927280387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The square root of 9927280387 is about 99635.7385028083. The cubic root of 9927280387 is about 2149.1996579038.

The spelling of 9927280387 in words is "nine billion, nine hundred twenty-seven million, two hundred eighty thousand, three hundred eighty-seven".