8520920117 has 2 divisors, whose sum is σ = 8520920118. Its totient is φ = 8520920116.

The previous prime is 8520920087. The next prime is 8520920129. The reversal of 8520920117 is 7110290258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7773772561 + 747147556 = 88169^2 + 27334^2 .

It is a cyclic number.

It is not a de Polignac number, because 8520920117 - 2¹⁶ = 8520854581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8520920137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4260460058 + 4260460059.

It is an arithmetic number, because the mean of its divisors is an integer number (4260460059).

Almost surely, 2^8520920117 is an apocalyptic number.

It is an amenable number.

8520920117 is a deficient number, since it is larger than the sum of its proper divisors (1).

8520920117 is an equidigital number, since it uses as much as digits as its factorization.

8520920117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 8520920117 is about 92308.8301139171. The cubic root of 8520920117 is about 2042.5004675332.

The spelling of 8520920117 in words is "eight billion, five hundred twenty million, nine hundred twenty thousand, one hundred seventeen".