1568920369 has 2 divisors, whose sum is σ = 1568920370. Its totient is φ = 1568920368.

The previous prime is 1568920343. The next prime is 1568920511. The reversal of 1568920369 is 9630298651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1377374769 + 191545600 = 37113^2 + 13840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1568920369 is a prime.

It is a super-2 number, since 2×1568920369² = 4923022248526192322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1568920069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 784460184 + 784460185.

It is an arithmetic number, because the mean of its divisors is an integer number (784460185).

Almost surely, 2^1568920369 is an apocalyptic number.

It is an amenable number.

1568920369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1568920369 is an equidigital number, since it uses as much as digits as its factorization.

1568920369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 1568920369 is about 39609.5994551826. The cubic root of 1568920369 is about 1161.9844077941.

The spelling of 1568920369 in words is "one billion, five hundred sixty-eight million, nine hundred twenty thousand, three hundred sixty-nine".