1329690647 has 8 divisors (see below), whose sum is σ = 1344233856. Its totient is φ = 1315164672.

The previous prime is 1329690641. The next prime is 1329690667. The reversal of 1329690647 is 7460969231.

It is a happy number.

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 1329690647 - 2¹⁰ = 1329689623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329690641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205658 + ... + 212024.

It is an arithmetic number, because the mean of its divisors is an integer number (168029232).

Almost surely, 2^1329690647 is an apocalyptic number.

1329690647 is a deficient number, since it is larger than the sum of its proper divisors (14543209).

1329690647 is an equidigital number, since it uses as much as digits as its factorization.

1329690647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8617.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 1329690647 is about 36464.9235156198. The cubic root of 1329690647 is about 1099.6391783506.

The spelling of 1329690647 in words is "one billion, three hundred twenty-nine million, six hundred ninety thousand, six hundred forty-seven".