1329393941 has 2 divisors, whose sum is σ = 1329393942. Its totient is φ = 1329393940.

The previous prime is 1329393937. The next prime is 1329393971. The reversal of 1329393941 is 1493939231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 760380625 + 569013316 = 27575^2 + 23854^2 .

It is an emirp because it is prime and its reverse (1493939231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1329393941 - 2² = 1329393937 is a prime.

It is a super-2 number, since 2×1329393941² = 3534576500735022962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1329393892 and 1329393901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1329393971) 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, 664696970 + 664696971.

It is an arithmetic number, because the mean of its divisors is an integer number (664696971).

Almost surely, 2^1329393941 is an apocalyptic number.

It is an amenable number.

1329393941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329393941 is an equidigital number, since it uses as much as digits as its factorization.

1329393941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 44.

The square root of 1329393941 is about 36460.8549131805. The cubic root of 1329393941 is about 1099.5573814269.

The spelling of 1329393941 in words is "one billion, three hundred twenty-nine million, three hundred ninety-three thousand, nine hundred forty-one".