1329647842 has 8 divisors (see below), whose sum is σ = 2021793516. Its totient is φ = 655716672.

The previous prime is 1329647833. The next prime is 1329647857. The reversal of 1329647842 is 2487469231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1222131681 + 107516161 = 34959^2 + 10369^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1329647792 and 1329647801.

It is an unprimeable number.

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, 4553443 + ... + 4553734.

Almost surely, 2^1329647842 is an apocalyptic number.

1329647842 is a deficient number, since it is larger than the sum of its proper divisors (692145674).

1329647842 is an equidigital number, since it uses as much as digits as its factorization.

1329647842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9107252.

The product of its digits is 580608, while the sum is 46.

The square root of 1329647842 is about 36464.3365769899. The cubic root of 1329647842 is about 1099.6273784731.

The spelling of 1329647842 in words is "one billion, three hundred twenty-nine million, six hundred forty-seven thousand, eight hundred forty-two".