1321330337 has 2 divisors, whose sum is σ = 1321330338. Its totient is φ = 1321330336.

The previous prime is 1321330279. The next prime is 1321330447. The reversal of 1321330337 is 7330331231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 859896976 + 461433361 = 29324^2 + 21481^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321330337 - 2¹⁴ = 1321313953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321330237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660665168 + 660665169.

It is an arithmetic number, because the mean of its divisors is an integer number (660665169).

Almost surely, 2^1321330337 is an apocalyptic number.

It is an amenable number.

1321330337 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321330337 is an equidigital number, since it uses as much as digits as its factorization.

1321330337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 26.

The square root of 1321330337 is about 36350.1077990148. The cubic root of 1321330337 is about 1097.3297039818.

Adding to 1321330337 its reverse (7330331231), we get a palindrome (8651661568).

The spelling of 1321330337 in words is "one billion, three hundred twenty-one million, three hundred thirty thousand, three hundred thirty-seven".