8513864617 has 2 divisors, whose sum is σ = 8513864618. Its totient is φ = 8513864616.

The previous prime is 8513864563. The next prime is 8513864627. The reversal of 8513864617 is 7164683158.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7958602521 + 555262096 = 89211^2 + 23564^2 .

It is a cyclic number.

It is not a de Polignac number, because 8513864617 - 2²³ = 8505476009 is a prime.

It is not a weakly prime, because it can be changed into another prime (8513864627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4256932308 + 4256932309.

It is an arithmetic number, because the mean of its divisors is an integer number (4256932309).

Almost surely, 2^8513864617 is an apocalyptic number.

It is an amenable number.

8513864617 is a deficient number, since it is larger than the sum of its proper divisors (1).

8513864617 is an equidigital number, since it uses as much as digits as its factorization.

8513864617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 49.

The square root of 8513864617 is about 92270.6053789613. The cubic root of 8513864617 is about 2041.9365675013.

The spelling of 8513864617 in words is "eight billion, five hundred thirteen million, eight hundred sixty-four thousand, six hundred seventeen".