2568397 has 4 divisors (see below), whose sum is σ = 2765980. Its totient is φ = 2370816.

The previous prime is 2568389. The next prime is 2568403. The reversal of 2568397 is 7938652.

2568397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1425636 + 1142761 = 1194^2 + 1069^2 .

It is a cyclic number.

It is not a de Polignac number, because 2568397 - 2³ = 2568389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568197) 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 in 3 ways as a sum of consecutive naturals, for example, 98772 + ... + 98797.

It is an arithmetic number, because the mean of its divisors is an integer number (691495).

2^2568397 is an apocalyptic number.

It is an amenable number.

2568397 is a deficient number, since it is larger than the sum of its proper divisors (197583).

2568397 is a wasteful number, since it uses less digits than its factorization.

2568397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197582.

The product of its digits is 90720, while the sum is 40.

The square root of 2568397 is about 1602.6219142393. The cubic root of 2568397 is about 136.9474819569.

The spelling of 2568397 in words is "two million, five hundred sixty-eight thousand, three hundred ninety-seven".