1323079561 has 2 divisors, whose sum is σ = 1323079562. Its totient is φ = 1323079560.

The previous prime is 1323079529. The next prime is 1323079579. The reversal of 1323079561 is 1659703231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1119303936 + 203775625 = 33456^2 + 14275^2 .

It is an emirp because it is prime and its reverse (1659703231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323079561 - 2⁵ = 1323079529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1323079561.

It is not a weakly prime, because it can be changed into another prime (1323079361) 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, 661539780 + 661539781.

It is an arithmetic number, because the mean of its divisors is an integer number (661539781).

Almost surely, 2^1323079561 is an apocalyptic number.

It is an amenable number.

1323079561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323079561 is an equidigital number, since it uses as much as digits as its factorization.

1323079561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 1323079561 is about 36374.1606226178. The cubic root of 1323079561 is about 1097.8137184631.

The spelling of 1323079561 in words is "one billion, three hundred twenty-three million, seventy-nine thousand, five hundred sixty-one".