1340403343 has 2 divisors, whose sum is σ = 1340403344. Its totient is φ = 1340403342.

The previous prime is 1340403341. The next prime is 1340403371. The reversal of 1340403343 is 3433040431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340403343 - 2¹ = 1340403341 is a prime.

It is a super-2 number, since 2×1340403343² = 3593362243851151298, which contains 22 as substring.

Together with 1340403341, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340403341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670201671 + 670201672.

It is an arithmetic number, because the mean of its divisors is an integer number (670201672).

Almost surely, 2^1340403343 is an apocalyptic number.

1340403343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340403343 is an equidigital number, since it uses as much as digits as its factorization.

1340403343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 1340403343 is about 36611.5192664822. The cubic root of 1340403343 is about 1102.5843760442.

Adding to 1340403343 its reverse (3433040431), we get a palindrome (4773443774).

The spelling of 1340403343 in words is "one billion, three hundred forty million, four hundred three thousand, three hundred forty-three".