1345716569 has 2 divisors, whose sum is σ = 1345716570. Its totient is φ = 1345716568.

The previous prime is 1345716557. The next prime is 1345716571. The reversal of 1345716569 is 9656175431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722964544 + 622752025 = 26888^2 + 24955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345716569 - 2⁸ = 1345716313 is a prime.

It is a super-2 number, since 2×1345716569² = 3621906168162263522, which contains 22 as substring.

Together with 1345716571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1345716509) 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, 672858284 + 672858285.

It is an arithmetic number, because the mean of its divisors is an integer number (672858285).

Almost surely, 2^1345716569 is an apocalyptic number.

It is an amenable number.

1345716569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345716569 is an equidigital number, since it uses as much as digits as its factorization.

1345716569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 47.

The square root of 1345716569 is about 36684.0097181320. The cubic root of 1345716569 is about 1104.0393004042.

The spelling of 1345716569 in words is "one billion, three hundred forty-five million, seven hundred sixteen thousand, five hundred sixty-nine".