1340304403 has 4 divisors (see below), whose sum is σ = 1410846760. Its totient is φ = 1269762048.

The previous prime is 1340304377. The next prime is 1340304421. The reversal of 1340304403 is 3044030431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340304403 - 2²⁵ = 1306749971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340304103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35271150 + ... + 35271187.

It is an arithmetic number, because the mean of its divisors is an integer number (352711690).

Almost surely, 2^1340304403 is an apocalyptic number.

1340304403 is a deficient number, since it is larger than the sum of its proper divisors (70542357).

1340304403 is an equidigital number, since it uses as much as digits as its factorization.

1340304403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70542356.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 1340304403 is about 36610.1680274756. The cubic root of 1340304403 is about 1102.5572468016.

Adding to 1340304403 its reverse (3044030431), we get a palindrome (4384334834).

The spelling of 1340304403 in words is "one billion, three hundred forty million, three hundred four thousand, four hundred three".