1329688673 has 8 divisors (see below), whose sum is σ = 1432260096. Its totient is φ = 1230847200.

The previous prime is 1329688663. The next prime is 1329688693. The reversal of 1329688673 is 3768869231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1329688673 - 2²⁰ = 1328640097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1329688663) 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 7 ways as a sum of consecutive naturals, for example, 931748 + ... + 933173.

It is an arithmetic number, because the mean of its divisors is an integer number (179032512).

Almost surely, 2^1329688673 is an apocalyptic number.

It is an amenable number.

1329688673 is a deficient number, since it is larger than the sum of its proper divisors (102571423).

1329688673 is a wasteful number, since it uses less digits than its factorization.

1329688673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864975.

The product of its digits is 2612736, while the sum is 53.

The square root of 1329688673 is about 36464.8964485024. The cubic root of 1329688673 is about 1099.6386341917.

The spelling of 1329688673 in words is "one billion, three hundred twenty-nine million, six hundred eighty-eight thousand, six hundred seventy-three".