1321332239 has 2 divisors, whose sum is σ = 1321332240. Its totient is φ = 1321332238.

The previous prime is 1321332217. The next prime is 1321332247. The reversal of 1321332239 is 9322331231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321332239 - 2¹² = 1321328143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321332289) 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, 660666119 + 660666120.

It is an arithmetic number, because the mean of its divisors is an integer number (660666120).

Almost surely, 2^1321332239 is an apocalyptic number.

1321332239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321332239 is an equidigital number, since it uses as much as digits as its factorization.

1321332239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 29.

The square root of 1321332239 is about 36350.1339612387. The cubic root of 1321332239 is about 1097.3302305016.

The spelling of 1321332239 in words is "one billion, three hundred twenty-one million, three hundred thirty-two thousand, two hundred thirty-nine".