8497424861 has 2 divisors, whose sum is σ = 8497424862. Its totient is φ = 8497424860.

The previous prime is 8497424843. The next prime is 8497424869. The reversal of 8497424861 is 1684247948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8173244836 + 324180025 = 90406^2 + 18005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8497424861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8497424869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4248712430 + 4248712431.

It is an arithmetic number, because the mean of its divisors is an integer number (4248712431).

Almost surely, 2^8497424861 is an apocalyptic number.

It is an amenable number.

8497424861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8497424861 is an equidigital number, since it uses as much as digits as its factorization.

8497424861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 53.

The square root of 8497424861 is about 92181.4778629633. The cubic root of 8497424861 is about 2040.6214354516.

The spelling of 8497424861 in words is "eight billion, four hundred ninety-seven million, four hundred twenty-four thousand, eight hundred sixty-one".