2040340123 has 2 divisors, whose sum is σ = 2040340124. Its totient is φ = 2040340122.

The previous prime is 2040340121. The next prime is 2040340151. The reversal of 2040340123 is 3210430402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2040340123 - 2¹ = 2040340121 is a prime.

Together with 2040340121, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2040340123.

It is not a weakly prime, because it can be changed into another prime (2040340121) 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 as a sum of consecutive naturals, namely, 1020170061 + 1020170062.

It is an arithmetic number, because the mean of its divisors is an integer number (1020170062).

Almost surely, 2^2040340123 is an apocalyptic number.

2040340123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040340123 is an equidigital number, since it uses as much as digits as its factorization.

2040340123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 2040340123 is about 45170.1242305132. The cubic root of 2040340123 is about 1268.3356218243.

Adding to 2040340123 its reverse (3210430402), we get a palindrome (5250770525).

The spelling of 2040340123 in words is "two billion, forty million, three hundred forty thousand, one hundred twenty-three".