8191268623 has 2 divisors, whose sum is σ = 8191268624. Its totient is φ = 8191268622.

The previous prime is 8191268621. The next prime is 8191268641. The reversal of 8191268623 is 3268621918.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8191268623 - 2¹ = 8191268621 is a prime.

It is a super-2 number, since 2×8191268623² (a number of 21 digits) contains 22 as substring.

Together with 8191268621, 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 (8191268621) 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, 4095634311 + 4095634312.

It is an arithmetic number, because the mean of its divisors is an integer number (4095634312).

Almost surely, 2^8191268623 is an apocalyptic number.

8191268623 is a deficient number, since it is larger than the sum of its proper divisors (1).

8191268623 is an equidigital number, since it uses as much as digits as its factorization.

8191268623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 46.

The square root of 8191268623 is about 90505.6275764110. The cubic root of 8191268623 is about 2015.8136860361.

The spelling of 8191268623 in words is "eight billion, one hundred ninety-one million, two hundred sixty-eight thousand, six hundred twenty-three".