1340123303 has 2 divisors, whose sum is σ = 1340123304. Its totient is φ = 1340123302.

The previous prime is 1340123297. The next prime is 1340123353. The reversal of 1340123303 is 3033210431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340123303 - 2¹⁰ = 1340122279 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340123353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670061651 + 670061652.

It is an arithmetic number, because the mean of its divisors is an integer number (670061652).

Almost surely, 2^1340123303 is an apocalyptic number.

1340123303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340123303 is an equidigital number, since it uses as much as digits as its factorization.

1340123303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1340123303 is about 36607.6945873405. The cubic root of 1340123303 is about 1102.5075859159.

Adding to 1340123303 its reverse (3033210431), we get a palindrome (4373333734).

The spelling of 1340123303 in words is "one billion, three hundred forty million, one hundred twenty-three thousand, three hundred three".