8499490091 has 2 divisors, whose sum is σ = 8499490092. Its totient is φ = 8499490090.

The previous prime is 8499490009. The next prime is 8499490099. The reversal of 8499490091 is 1900949948.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8499490091 - 2¹⁰ = 8499489067 is a prime.

It is not a weakly prime, because it can be changed into another prime (8499490099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4249745045 + 4249745046.

It is an arithmetic number, because the mean of its divisors is an integer number (4249745046).

Almost surely, 2^8499490091 is an apocalyptic number.

8499490091 is a deficient number, since it is larger than the sum of its proper divisors (1).

8499490091 is an equidigital number, since it uses as much as digits as its factorization.

8499490091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 8499490091 is about 92192.6791616341. The cubic root of 8499490091 is about 2040.7867408745.

The spelling of 8499490091 in words is "eight billion, four hundred ninety-nine million, four hundred ninety thousand, ninety-one".