2569387321 has 2 divisors, whose sum is σ = 2569387322. Its totient is φ = 2569387320.

The previous prime is 2569387319. The next prime is 2569387393. The reversal of 2569387321 is 1237839652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2534115600 + 35271721 = 50340^2 + 5939^2 .

It is a cyclic number.

It is not a de Polignac number, because 2569387321 - 2¹ = 2569387319 is a prime.

Together with 2569387319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2569387421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1284693660 + 1284693661.

It is an arithmetic number, because the mean of its divisors is an integer number (1284693661).

Almost surely, 2^2569387321 is an apocalyptic number.

It is an amenable number.

2569387321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2569387321 is an equidigital number, since it uses as much as digits as its factorization.

2569387321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The square root of 2569387321 is about 50689.1242871683. The cubic root of 2569387321 is about 1369.6508107158.

The spelling of 2569387321 in words is "two billion, five hundred sixty-nine million, three hundred eighty-seven thousand, three hundred twenty-one".