1329686563 has 2 divisors, whose sum is σ = 1329686564. Its totient is φ = 1329686562.

The previous prime is 1329686551. The next prime is 1329686581. The reversal of 1329686563 is 3656869231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1329686563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1329686543) 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 as a sum of consecutive naturals, namely, 664843281 + 664843282.

It is an arithmetic number, because the mean of its divisors is an integer number (664843282).

Almost surely, 2^1329686563 is an apocalyptic number.

1329686563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329686563 is an equidigital number, since it uses as much as digits as its factorization.

1329686563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 49.

The square root of 1329686563 is about 36464.8675165563. The cubic root of 1329686563 is about 1099.6380525421.

The spelling of 1329686563 in words is "one billion, three hundred twenty-nine million, six hundred eighty-six thousand, five hundred sixty-three".