8718491 has 2 divisors, whose sum is σ = 8718492. Its totient is φ = 8718490.

The previous prime is 8718487. The next prime is 8718503. The reversal of 8718491 is 1948178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8718491 - 2² = 8718487 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8718401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4359245 + 4359246.

It is an arithmetic number, because the mean of its divisors is an integer number (4359246).

Almost surely, 2^8718491 is an apocalyptic number.

8718491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8718491 is an equidigital number, since it uses as much as digits as its factorization.

8718491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 38.

The square root of 8718491 is about 2952.7090950515. The cubic root of 8718491 is about 205.8166197243.

The spelling of 8718491 in words is "eight million, seven hundred eighteen thousand, four hundred ninety-one".