1324111661 has 2 divisors, whose sum is σ = 1324111662. Its totient is φ = 1324111660.

The previous prime is 1324111643. The next prime is 1324111669. The reversal of 1324111661 is 1661114231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 808549225 + 515562436 = 28435^2 + 22706^2 .

It is a cyclic number.

It is not a de Polignac number, because 1324111661 - 2⁶ = 1324111597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1324111661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1324111669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662055830 + 662055831.

It is an arithmetic number, because the mean of its divisors is an integer number (662055831).

Almost surely, 2^1324111661 is an apocalyptic number.

It is an amenable number.

1324111661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1324111661 is an equidigital number, since it uses as much as digits as its factorization.

1324111661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 1324111661 is about 36388.3451258779. The cubic root of 1324111661 is about 1098.0991029247.

Adding to 1324111661 its reverse (1661114231), we get a palindrome (2985225892).

The spelling of 1324111661 in words is "one billion, three hundred twenty-four million, one hundred eleven thousand, six hundred sixty-one".