8490917 has 2 divisors, whose sum is σ = 8490918. Its totient is φ = 8490916.

The previous prime is 8490913. The next prime is 8490919. The reversal of 8490917 is 7190948.

8490917 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5755201 + 2735716 = 2399^2 + 1654^2 .

It is a cyclic number.

It is not a de Polignac number, because 8490917 - 2² = 8490913 is a prime.

Together with 8490919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8490913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245458 + 4245459.

It is an arithmetic number, because the mean of its divisors is an integer number (4245459).

Almost surely, 2^8490917 is an apocalyptic number.

It is an amenable number.

8490917 is a deficient number, since it is larger than the sum of its proper divisors (1).

8490917 is an equidigital number, since it uses as much as digits as its factorization.

8490917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 8490917 is about 2913.9178094106. The cubic root of 8490917 is about 204.0100357103.

The spelling of 8490917 in words is "eight million, four hundred ninety thousand, nine hundred seventeen".