1322361661 has 4 divisors (see below), whose sum is σ = 1323697024. Its totient is φ = 1321026300.

The previous prime is 1322361617. The next prime is 1322361673. The reversal of 1322361661 is 1661632231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1322361661 - 2¹⁹ = 1321837373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322361361) 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 in 3 ways as a sum of consecutive naturals, for example, 666195 + ... + 668176.

It is an arithmetic number, because the mean of its divisors is an integer number (330924256).

Almost surely, 2^1322361661 is an apocalyptic number.

It is an amenable number.

1322361661 is a deficient number, since it is larger than the sum of its proper divisors (1335363).

1322361661 is an equidigital number, since it uses as much as digits as its factorization.

1322361661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335362.

The product of its digits is 7776, while the sum is 31.

The square root of 1322361661 is about 36364.2910146754. The cubic root of 1322361661 is about 1097.6151254536.

Adding to 1322361661 its reverse (1661632231), we get a palindrome (2983993892).

The spelling of 1322361661 in words is "one billion, three hundred twenty-two million, three hundred sixty-one thousand, six hundred sixty-one".