1329644117 has 4 divisors (see below), whose sum is σ = 1330667436. Its totient is φ = 1328620800.

The previous prime is 1329644089. The next prime is 1329644143. The reversal of 1329644117 is 7114469231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59505796 + 1270138321 = 7714^2 + 35639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1329644117 - 2¹² = 1329640021 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 (1329644317) 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, 509708 + ... + 512309.

It is an arithmetic number, because the mean of its divisors is an integer number (332666859).

Almost surely, 2^1329644117 is an apocalyptic number.

It is an amenable number.

1329644117 is a deficient number, since it is larger than the sum of its proper divisors (1023319).

1329644117 is a wasteful number, since it uses less digits than its factorization.

1329644117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023318.

The product of its digits is 36288, while the sum is 38.

The square root of 1329644117 is about 36464.2854996502. The cubic root of 1329644117 is about 1099.6263516057.

The spelling of 1329644117 in words is "one billion, three hundred twenty-nine million, six hundred forty-four thousand, one hundred seventeen".