1320345599 has 2 divisors, whose sum is σ = 1320345600. Its totient is φ = 1320345598.

The previous prime is 1320345581. The next prime is 1320345623. The reversal of 1320345599 is 9955430231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320345599 is a prime.

It is a super-3 number, since 3×1320345599³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320345539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660172799 + 660172800.

It is an arithmetic number, because the mean of its divisors is an integer number (660172800).

Almost surely, 2^1320345599 is an apocalyptic number.

1320345599 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320345599 is an equidigital number, since it uses as much as digits as its factorization.

1320345599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 1320345599 is about 36336.5600876032. The cubic root of 1320345599 is about 1097.0570366610.

The spelling of 1320345599 in words is "one billion, three hundred twenty million, three hundred forty-five thousand, five hundred ninety-nine".