1320599099 has 2 divisors, whose sum is σ = 1320599100. Its totient is φ = 1320599098.

The previous prime is 1320599089. The next prime is 1320599113. The reversal of 1320599099 is 9909950231.

It is a weak prime.

It is an emirp because it is prime and its reverse (9909950231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320599099 is a prime.

It is a super-3 number, since 3×1320599099³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1320599089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660299549 + 660299550.

It is an arithmetic number, because the mean of its divisors is an integer number (660299550).

Almost surely, 2^1320599099 is an apocalyptic number.

1320599099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320599099 is an equidigital number, since it uses as much as digits as its factorization.

1320599099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196830, while the sum is 47.

The square root of 1320599099 is about 36340.0481425108. The cubic root of 1320599099 is about 1097.1272420584.

The spelling of 1320599099 in words is "one billion, three hundred twenty million, five hundred ninety-nine thousand, ninety-nine".