1329393939 has 4 divisors (see below), whose sum is σ = 1772525256. Its totient is φ = 886262624.

The previous prime is 1329393937. The next prime is 1329393941. The reversal of 1329393939 is 9393939231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1329393937) and next prime (1329393941).

It is a cyclic number.

It is not a de Polignac number, because 1329393939 - 2¹ = 1329393937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1329393891 and 1329393900.

It is not an unprimeable number, because it can be changed into a prime (1329393937) 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, 221565654 + ... + 221565659.

It is an arithmetic number, because the mean of its divisors is an integer number (443131314).

Almost surely, 2^1329393939 is an apocalyptic number.

1329393939 is a deficient number, since it is larger than the sum of its proper divisors (443131317).

1329393939 is an equidigital number, since it uses as much as digits as its factorization.

1329393939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443131316.

The product of its digits is 1062882, while the sum is 51.

The square root of 1329393939 is about 36460.8548857538. The cubic root of 1329393939 is about 1099.5573808755.

The spelling of 1329393939 in words is "one billion, three hundred twenty-nine million, three hundred ninety-three thousand, nine hundred thirty-nine".