1328811461 has 2 divisors, whose sum is σ = 1328811462. Its totient is φ = 1328811460.

The previous prime is 1328811437. The next prime is 1328811503. The reversal of 1328811461 is 1641188231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 858138436 + 470673025 = 29294^2 + 21695^2 .

It is an emirp because it is prime and its reverse (1641188231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1328811461 - 2⁶ = 1328811397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1328811431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664405730 + 664405731.

It is an arithmetic number, because the mean of its divisors is an integer number (664405731).

Almost surely, 2^1328811461 is an apocalyptic number.

It is an amenable number.

1328811461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328811461 is an equidigital number, since it uses as much as digits as its factorization.

1328811461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 35.

The square root of 1328811461 is about 36452.8662933383. The cubic root of 1328811461 is about 1099.3967659444.

Adding to 1328811461 its reverse (1641188231), we get a palindrome (2969999692).

The spelling of 1328811461 in words is "one billion, three hundred twenty-eight million, eight hundred eleven thousand, four hundred sixty-one".