1321153633 has 2 divisors, whose sum is σ = 1321153634. Its totient is φ = 1321153632.

The previous prime is 1321153627. The next prime is 1321153651. The reversal of 1321153633 is 3363511231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 945685504 + 375468129 = 30752^2 + 19377^2 .

It is an emirp because it is prime and its reverse (3363511231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321153633 - 2⁵ = 1321153601 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321153663) 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, 660576816 + 660576817.

It is an arithmetic number, because the mean of its divisors is an integer number (660576817).

Almost surely, 2^1321153633 is an apocalyptic number.

It is an amenable number.

1321153633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321153633 is an equidigital number, since it uses as much as digits as its factorization.

1321153633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 28.

The square root of 1321153633 is about 36347.6771334841. The cubic root of 1321153633 is about 1097.2807858102.

Adding to 1321153633 its reverse (3363511231), we get a palindrome (4684664864).

The spelling of 1321153633 in words is "one billion, three hundred twenty-one million, one hundred fifty-three thousand, six hundred thirty-three".