1000320313 has 4 divisors (see below), whose sum is σ = 1000389348. Its totient is φ = 1000251280.

The previous prime is 1000320283. The next prime is 1000320331. The reversal of 1000320313 is 3130230001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3130230001 = 199 ⋅15729799.

It can be written as a sum of positive squares in 2 ways, for example, as 868598784 + 131721529 = 29472^2 + 11477^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000320313 - 2⁵ = 1000320281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000320293 and 1000320302.

It is not an unprimeable number, because it can be changed into a prime (1000320413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3478 + ... + 44863.

It is an arithmetic number, because the mean of its divisors is an integer number (250097337).

Almost surely, 2^1000320313 is an apocalyptic number.

It is an amenable number.

1000320313 is a deficient number, since it is larger than the sum of its proper divisors (69035).

1000320313 is an equidigital number, since it uses as much as digits as its factorization.

1000320313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69034.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 1000320313 is about 31627.8407894058. The cubic root of 1000320313 is about 1000.1067596020.

Adding to 1000320313 its reverse (3130230001), we get a palindrome (4130550314).

The spelling of 1000320313 in words is "one billion, three hundred twenty thousand, three hundred thirteen".