1329973686 has 12 divisors (see below), whose sum is σ = 2881609692. Its totient is φ = 443324556.

The previous prime is 1329973681. The next prime is 1329973741. The reversal of 1329973686 is 6863799231.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329973681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36943696 + ... + 36943731.

It is an arithmetic number, because the mean of its divisors is an integer number (240134141).

Almost surely, 2^1329973686 is an apocalyptic number.

1329973686 is an abundant number, since it is smaller than the sum of its proper divisors (1551636006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1329973686 is a wasteful number, since it uses less digits than its factorization.

1329973686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73887435 (or 73887432 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 1329973686 is about 36468.8042853066. The cubic root of 1329973686 is about 1099.7171961695.

The spelling of 1329973686 in words is "one billion, three hundred twenty-nine million, nine hundred seventy-three thousand, six hundred eighty-six".