8139264191 has 2 divisors, whose sum is σ = 8139264192. Its totient is φ = 8139264190.

The previous prime is 8139264167. The next prime is 8139264257. The reversal of 8139264191 is 1914629318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8139264191 - 2¹⁴ = 8139247807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8139164191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4069632095 + 4069632096.

It is an arithmetic number, because the mean of its divisors is an integer number (4069632096).

Almost surely, 2^8139264191 is an apocalyptic number.

8139264191 is a deficient number, since it is larger than the sum of its proper divisors (1).

8139264191 is an equidigital number, since it uses as much as digits as its factorization.

8139264191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The square root of 8139264191 is about 90217.8706853581. The cubic root of 8139264191 is about 2011.5386509948.

The spelling of 8139264191 in words is "eight billion, one hundred thirty-nine million, two hundred sixty-four thousand, one hundred ninety-one".