1329143069 has 2 divisors, whose sum is σ = 1329143070. Its totient is φ = 1329143068.

The previous prime is 1329143009. The next prime is 1329143071. The reversal of 1329143069 is 9603419231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 697224025 + 631919044 = 26405^2 + 25138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1329143069 is a prime.

It is a super-2 number, since 2×1329143069² = 3533242595741477522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1329143071, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1329143009) 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 as a sum of consecutive naturals, namely, 664571534 + 664571535.

It is an arithmetic number, because the mean of its divisors is an integer number (664571535).

Almost surely, 2^1329143069 is an apocalyptic number.

It is an amenable number.

1329143069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329143069 is an equidigital number, since it uses as much as digits as its factorization.

1329143069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 1329143069 is about 36457.4144585158. The cubic root of 1329143069 is about 1099.4882106806.

The spelling of 1329143069 in words is "one billion, three hundred twenty-nine million, one hundred forty-three thousand, sixty-nine".