8699417861 has 2 divisors, whose sum is σ = 8699417862. Its totient is φ = 8699417860.

The previous prime is 8699417851. The next prime is 8699417891. The reversal of 8699417861 is 1687149968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4868550625 + 3830867236 = 69775^2 + 61894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8699417861 is a prime.

It is a super-2 number, since 2×8699417861² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8699417861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8699417821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4349708930 + 4349708931.

It is an arithmetic number, because the mean of its divisors is an integer number (4349708931).

Almost surely, 2^8699417861 is an apocalyptic number.

It is an amenable number.

8699417861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8699417861 is an equidigital number, since it uses as much as digits as its factorization.

8699417861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 59.

The square root of 8699417861 is about 93270.6698860901. The cubic root of 8699417861 is about 2056.6642419578.

The spelling of 8699417861 in words is "eight billion, six hundred ninety-nine million, four hundred seventeen thousand, eight hundred sixty-one".