1213343239 has 2 divisors, whose sum is σ = 1213343240. Its totient is φ = 1213343238.

The previous prime is 1213343237. The next prime is 1213343273. The reversal of 1213343239 is 9323433121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213343239 - 2¹ = 1213343237 is a prime.

It is a super-2 number, since 2×1213343239² = 2944403631254022242, which contains 22 as substring.

Together with 1213343237, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1213343239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213343231) 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, 606671619 + 606671620.

It is an arithmetic number, because the mean of its divisors is an integer number (606671620).

Almost surely, 2^1213343239 is an apocalyptic number.

1213343239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213343239 is an equidigital number, since it uses as much as digits as its factorization.

1213343239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 31.

The square root of 1213343239 is about 34833.0767949086. The cubic root of 1213343239 is about 1066.5827565612.

The spelling of 1213343239 in words is "one billion, two hundred thirteen million, three hundred forty-three thousand, two hundred thirty-nine".