8408990717 has 2 divisors, whose sum is σ = 8408990718. Its totient is φ = 8408990716.

The previous prime is 8408990663. The next prime is 8408990729. The reversal of 8408990717 is 7170998048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7802895556 + 606095161 = 88334^2 + 24619^2 .

It is a cyclic number.

It is not a de Polignac number, because 8408990717 - 2⁸ = 8408990461 is a prime.

It is a super-2 number, since 2×8408990717² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8408990747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4204495358 + 4204495359.

It is an arithmetic number, because the mean of its divisors is an integer number (4204495359).

Almost surely, 2^8408990717 is an apocalyptic number.

It is an amenable number.

8408990717 is a deficient number, since it is larger than the sum of its proper divisors (1).

8408990717 is an equidigital number, since it uses as much as digits as its factorization.

8408990717 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 8408990717 is about 91700.5491641135. The cubic root of 8408990717 is about 2033.5177036050.

The spelling of 8408990717 in words is "eight billion, four hundred eight million, nine hundred ninety thousand, seven hundred seventeen".