1340320303 has 4 divisors (see below), whose sum is σ = 1531794640. Its totient is φ = 1148845968.

The previous prime is 1340320297. The next prime is 1340320313. The reversal of 1340320303 is 3030230431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3030230431 = 1153 ⋅2628127.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340320303 is a prime.

It is a super-3 number, since 3×1340320303³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340320313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95737158 + ... + 95737171.

It is an arithmetic number, because the mean of its divisors is an integer number (382948660).

Almost surely, 2^1340320303 is an apocalyptic number.

1340320303 is a deficient number, since it is larger than the sum of its proper divisors (191474337).

1340320303 is an equidigital number, since it uses as much as digits as its factorization.

1340320303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191474336.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 1340320303 is about 36610.3851796181. The cubic root of 1340320303 is about 1102.5616066547.

Adding to 1340320303 its reverse (3030230431), we get a palindrome (4370550734).

The spelling of 1340320303 in words is "one billion, three hundred forty million, three hundred twenty thousand, three hundred three".