8490491 has 2 divisors, whose sum is σ = 8490492. Its totient is φ = 8490490.

The previous prime is 8490487. The next prime is 8490499. The reversal of 8490491 is 1940948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8490491 - 2² = 8490487 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8490499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245245 + 4245246.

It is an arithmetic number, because the mean of its divisors is an integer number (4245246).

Almost surely, 2^8490491 is an apocalyptic number.

8490491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8490491 is an equidigital number, since it uses as much as digits as its factorization.

8490491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 8490491 is about 2913.8447110304. The cubic root of 8490491 is about 204.0066238398.

The spelling of 8490491 in words is "eight million, four hundred ninety thousand, four hundred ninety-one".