8428260689 has 2 divisors, whose sum is σ = 8428260690. Its totient is φ = 8428260688.

The previous prime is 8428260683. The next prime is 8428260707. The reversal of 8428260689 is 9860628248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7901787664 + 526473025 = 88892^2 + 22945^2 .

It is a cyclic number.

It is not a de Polignac number, because 8428260689 - 2⁸ = 8428260433 is a prime.

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 8428260689.

It is not a weakly prime, because it can be changed into another prime (8428260683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4214130344 + 4214130345.

It is an arithmetic number, because the mean of its divisors is an integer number (4214130345).

Almost surely, 2^8428260689 is an apocalyptic number.

It is an amenable number.

8428260689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8428260689 is an equidigital number, since it uses as much as digits as its factorization.

8428260689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2654208, while the sum is 53.

The square root of 8428260689 is about 91805.5591399562. The cubic root of 8428260689 is about 2035.0698492365.

The spelling of 8428260689 in words is "eight billion, four hundred twenty-eight million, two hundred sixty thousand, six hundred eighty-nine".