8520788191 has 2 divisors, whose sum is σ = 8520788192. Its totient is φ = 8520788190.

The previous prime is 8520788189. The next prime is 8520788257. The reversal of 8520788191 is 1918870258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8520788191 - 2¹ = 8520788189 is a prime.

Together with 8520788189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8520788491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4260394095 + 4260394096.

It is an arithmetic number, because the mean of its divisors is an integer number (4260394096).

Almost surely, 2^8520788191 is an apocalyptic number.

8520788191 is a deficient number, since it is larger than the sum of its proper divisors (1).

8520788191 is an equidigital number, since it uses as much as digits as its factorization.

8520788191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 49.

The square root of 8520788191 is about 92308.1155207926. The cubic root of 8520788191 is about 2042.4899264060.

The spelling of 8520788191 in words is "eight billion, five hundred twenty million, seven hundred eighty-eight thousand, one hundred ninety-one".