1213043329 has 2 divisors, whose sum is σ = 1213043330. Its totient is φ = 1213043328.

The previous prime is 1213043327. The next prime is 1213043399. The reversal of 1213043329 is 9233403121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1061260929 + 151782400 = 32577^2 + 12320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213043329 - 2¹ = 1213043327 is a prime.

Together with 1213043327, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1213043297 and 1213043306.

It is not a weakly prime, because it can be changed into another prime (1213043323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606521664 + 606521665.

It is an arithmetic number, because the mean of its divisors is an integer number (606521665).

Almost surely, 2^1213043329 is an apocalyptic number.

It is an amenable number.

1213043329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213043329 is an equidigital number, since it uses as much as digits as its factorization.

1213043329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1213043329 is about 34828.7715689199. The cubic root of 1213043329 is about 1066.4948712365.

The spelling of 1213043329 in words is "one billion, two hundred thirteen million, forty-three thousand, three hundred twenty-nine".