1329552643 has 4 divisors (see below), whose sum is σ = 1407761640. Its totient is φ = 1251343648.

The previous prime is 1329552641. The next prime is 1329552649. The reversal of 1329552643 is 3462559231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3462559231 = 47 ⋅73671473.

It is a cyclic number.

It is not a de Polignac number, because 1329552643 - 2¹ = 1329552641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1329552596 and 1329552605.

It is not an unprimeable number, because it can be changed into a prime (1329552641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39104473 + ... + 39104506.

It is an arithmetic number, because the mean of its divisors is an integer number (351940410).

Almost surely, 2^1329552643 is an apocalyptic number.

1329552643 is a deficient number, since it is larger than the sum of its proper divisors (78208997).

1329552643 is an equidigital number, since it uses as much as digits as its factorization.

1329552643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78208996.

The product of its digits is 194400, while the sum is 40.

The square root of 1329552643 is about 36463.0311822810. The cubic root of 1329552643 is about 1099.6011344502.

The spelling of 1329552643 in words is "one billion, three hundred twenty-nine million, five hundred fifty-two thousand, six hundred forty-three".