1320244139 has 2 divisors, whose sum is σ = 1320244140. Its totient is φ = 1320244138.

The previous prime is 1320244109. The next prime is 1320244141. The reversal of 1320244139 is 9314420231.

It is a strong prime.

It is an emirp because it is prime and its reverse (9314420231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320244139 - 2¹⁶ = 1320178603 is a prime.

Together with 1320244141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1320244109) 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, 660122069 + 660122070.

It is an arithmetic number, because the mean of its divisors is an integer number (660122070).

Almost surely, 2^1320244139 is an apocalyptic number.

1320244139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320244139 is an equidigital number, since it uses as much as digits as its factorization.

1320244139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1320244139 is about 36335.1639462381. The cubic root of 1320244139 is about 1097.0289353674.

The spelling of 1320244139 in words is "one billion, three hundred twenty million, two hundred forty-four thousand, one hundred thirty-nine".