1329805441 has 4 divisors (see below), whose sum is σ = 1330828884. Its totient is φ = 1328782000.

The previous prime is 1329805403. The next prime is 1329805471. The reversal of 1329805441 is 1445089231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1445089231 = 2477 ⋅583403.

It can be written as a sum of positive squares in 2 ways, for example, as 43507216 + 1286298225 = 6596^2 + 35865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1329805441 - 2⁹ = 1329804929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1329805441.

It is not an unprimeable number, because it can be changed into a prime (1329805471) 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 in 3 ways as a sum of consecutive naturals, for example, 509770 + ... + 512371.

It is an arithmetic number, because the mean of its divisors is an integer number (332707221).

Almost surely, 2^1329805441 is an apocalyptic number.

It is an amenable number.

1329805441 is a deficient number, since it is larger than the sum of its proper divisors (1023443).

1329805441 is a wasteful number, since it uses less digits than its factorization.

1329805441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023442.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1329805441 is about 36466.4975148423. The cubic root of 1329805441 is about 1099.6708218880.

The spelling of 1329805441 in words is "one billion, three hundred twenty-nine million, eight hundred five thousand, four hundred forty-one".