1329811841 has 2 divisors, whose sum is σ = 1329811842. Its totient is φ = 1329811840.

The previous prime is 1329811837. The next prime is 1329811871. The reversal of 1329811841 is 1481189231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1095874816 + 233937025 = 33104^2 + 15295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1329811841 - 2² = 1329811837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1329811795 and 1329811804.

It is not a weakly prime, because it can be changed into another prime (1329811871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664905920 + 664905921.

It is an arithmetic number, because the mean of its divisors is an integer number (664905921).

Almost surely, 2^1329811841 is an apocalyptic number.

It is an amenable number.

1329811841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329811841 is an equidigital number, since it uses as much as digits as its factorization.

1329811841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 38.

The square root of 1329811841 is about 36466.5852665149. The cubic root of 1329811841 is about 1099.6725860263.

The spelling of 1329811841 in words is "one billion, three hundred twenty-nine million, eight hundred eleven thousand, eight hundred forty-one".