9928209127 has 2 divisors, whose sum is σ = 9928209128. Its totient is φ = 9928209126.

The previous prime is 9928209121. The next prime is 9928209169. The reversal of 9928209127 is 7219028299.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9928209127 - 2³ = 9928209119 is a prime.

It is a super-2 number, since 2×9928209127² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9928209121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4964104563 + 4964104564.

It is an arithmetic number, because the mean of its divisors is an integer number (4964104564).

Almost surely, 2^9928209127 is an apocalyptic number.

9928209127 is a deficient number, since it is larger than the sum of its proper divisors (1).

9928209127 is an equidigital number, since it uses as much as digits as its factorization.

9928209127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 9928209127 is about 99640.3990708588. The cubic root of 9928209127 is about 2149.2666781205.

The spelling of 9928209127 in words is "nine billion, nine hundred twenty-eight million, two hundred nine thousand, one hundred twenty-seven".