8491089077 has 2 divisors, whose sum is σ = 8491089078. Its totient is φ = 8491089076.

The previous prime is 8491089071. The next prime is 8491089199. The reversal of 8491089077 is 7709801948.

8491089077 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4273106161 + 4217982916 = 65369^2 + 64946^2 .

It is a cyclic number.

It is not a de Polignac number, because 8491089077 - 2¹² = 8491084981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8491089071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245544538 + 4245544539.

It is an arithmetic number, because the mean of its divisors is an integer number (4245544539).

Almost surely, 2^8491089077 is an apocalyptic number.

It is an amenable number.

8491089077 is a deficient number, since it is larger than the sum of its proper divisors (1).

8491089077 is an equidigital number, since it uses as much as digits as its factorization.

8491089077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 8491089077 is about 92147.1056355000. The cubic root of 8491089077 is about 2040.1141385741.

The spelling of 8491089077 in words is "eight billion, four hundred ninety-one million, eighty-nine thousand, seventy-seven".