2568869 has 2 divisors, whose sum is σ = 2568870. Its totient is φ = 2568868.

The previous prime is 2568833. The next prime is 2568871. The reversal of 2568869 is 9688652.

It is a happy number.

2568869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2512225 + 56644 = 1585^2 + 238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2568869 is a prime.

It is a super-2 number, since 2×2568869² = 13198175878322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2568871, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2568169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1284434 + 1284435.

It is an arithmetic number, because the mean of its divisors is an integer number (1284435).

2^2568869 is an apocalyptic number.

It is an amenable number.

2568869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2568869 is an equidigital number, since it uses as much as digits as its factorization.

2568869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The square root of 2568869 is about 1602.7691661621. The cubic root of 2568869 is about 136.9558704903.

The spelling of 2568869 in words is "two million, five hundred sixty-eight thousand, eight hundred sixty-nine".