1320399233 has 2 divisors, whose sum is σ = 1320399234. Its totient is φ = 1320399232.

The previous prime is 1320399221. The next prime is 1320399251. The reversal of 1320399233 is 3329930231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1120374784 + 200024449 = 33472^2 + 14143^2 .

It is an emirp because it is prime and its reverse (3329930231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320399233 - 2⁶ = 1320399169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320399193 and 1320399202.

It is not a weakly prime, because it can be changed into another prime (1320399263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660199616 + 660199617.

It is an arithmetic number, because the mean of its divisors is an integer number (660199617).

Almost surely, 2^1320399233 is an apocalyptic number.

It is an amenable number.

1320399233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320399233 is an equidigital number, since it uses as much as digits as its factorization.

1320399233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 35.

The square root of 1320399233 is about 36337.2980971343. The cubic root of 1320399233 is about 1097.0718910447.

The spelling of 1320399233 in words is "one billion, three hundred twenty million, three hundred ninety-nine thousand, two hundred thirty-three".