1568242369 has 2 divisors, whose sum is σ = 1568242370. Its totient is φ = 1568242368.

The previous prime is 1568242339. The next prime is 1568242393. The reversal of 1568242369 is 9632428651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1568160000 + 82369 = 39600^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 1568242369 - 2¹¹ = 1568240321 is a prime.

It is a super-2 number, since 2×1568242369² = 4918768255853464322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1568242339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 784121184 + 784121185.

It is an arithmetic number, because the mean of its divisors is an integer number (784121185).

Almost surely, 2^1568242369 is an apocalyptic number.

It is an amenable number.

1568242369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1568242369 is an equidigital number, since it uses as much as digits as its factorization.

1568242369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 46.

The square root of 1568242369 is about 39601.0399989697. The cubic root of 1568242369 is about 1161.8170020298.

The spelling of 1568242369 in words is "one billion, five hundred sixty-eight million, two hundred forty-two thousand, three hundred sixty-nine".