1320544439 has 2 divisors, whose sum is σ = 1320544440. Its totient is φ = 1320544438.

The previous prime is 1320544369. The next prime is 1320544447. The reversal of 1320544439 is 9344450231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320544439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320544399 and 1320544408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320544639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660272219 + 660272220.

It is an arithmetic number, because the mean of its divisors is an integer number (660272220).

Almost surely, 2^1320544439 is an apocalyptic number.

1320544439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320544439 is an equidigital number, since it uses as much as digits as its factorization.

1320544439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 1320544439 is about 36339.2960718834. The cubic root of 1320544439 is about 1097.1121050391.

The spelling of 1320544439 in words is "one billion, three hundred twenty million, five hundred forty-four thousand, four hundred thirty-nine".