9919257827 has 2 divisors, whose sum is σ = 9919257828. Its totient is φ = 9919257826.

The previous prime is 9919257811. The next prime is 9919257853. The reversal of 9919257827 is 7287529199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9919257827 - 2⁴ = 9919257811 is a prime.

It is not a weakly prime, because it can be changed into another prime (9919257727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4959628913 + 4959628914.

It is an arithmetic number, because the mean of its divisors is an integer number (4959628914).

Almost surely, 2^9919257827 is an apocalyptic number.

9919257827 is a deficient number, since it is larger than the sum of its proper divisors (1).

9919257827 is an equidigital number, since it uses as much as digits as its factorization.

9919257827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 59.

The square root of 9919257827 is about 99595.4709161014. The cubic root of 9919257827 is about 2148.6205556975.

The spelling of 9919257827 in words is "nine billion, nine hundred nineteen million, two hundred fifty-seven thousand, eight hundred twenty-seven".