1320202313 has 4 divisors (see below), whose sum is σ = 1326459408. Its totient is φ = 1313945220.

The previous prime is 1320202307. The next prime is 1320202343. The reversal of 1320202313 is 3132020231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3132020231 = 71 ⋅44112961.

It is a cyclic number.

It is not a de Polignac number, because 1320202313 - 2⁶ = 1320202249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320202291 and 1320202300.

It is not an unprimeable number, because it can be changed into a prime (1320202343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3128231 + ... + 3128652.

It is an arithmetic number, because the mean of its divisors is an integer number (331614852).

Almost surely, 2^1320202313 is an apocalyptic number.

It is an amenable number.

1320202313 is a deficient number, since it is larger than the sum of its proper divisors (6257095).

1320202313 is an equidigital number, since it uses as much as digits as its factorization.

1320202313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6257094.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1320202313 is about 36334.5883835224. The cubic root of 1320202313 is about 1097.0173504351.

Adding to 1320202313 its reverse (3132020231), we get a palindrome (4452222544).

It can be divided in two parts, 132020231 and 3, that multiplied together give a palindrome (396060693).

The spelling of 1320202313 in words is "one billion, three hundred twenty million, two hundred two thousand, three hundred thirteen".