8249323991 has 2 divisors, whose sum is σ = 8249323992. Its totient is φ = 8249323990.

The previous prime is 8249323987. The next prime is 8249324023. The reversal of 8249323991 is 1993239428.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8249323991 - 2² = 8249323987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8249323961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4124661995 + 4124661996.

It is an arithmetic number, because the mean of its divisors is an integer number (4124661996).

Almost surely, 2^8249323991 is an apocalyptic number.

8249323991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8249323991 is an equidigital number, since it uses as much as digits as its factorization.

8249323991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 50.

The square root of 8249323991 is about 90825.7892396207. The cubic root of 8249323991 is about 2020.5648186091.

The spelling of 8249323991 in words is "eight billion, two hundred forty-nine million, three hundred twenty-three thousand, nine hundred ninety-one".