340340123 has 2 divisors, whose sum is σ = 340340124. Its totient is φ = 340340122.

The previous prime is 340340111. The next prime is 340340129. The reversal of 340340123 is 321043043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340340123 - 2⁴ = 340340107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340340095 and 340340104.

It is not a weakly prime, because it can be changed into another prime (340340129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170170061 + 170170062.

It is an arithmetic number, because the mean of its divisors is an integer number (170170062).

Almost surely, 2^340340123 is an apocalyptic number.

340340123 is a deficient number, since it is larger than the sum of its proper divisors (1).

340340123 is an equidigital number, since it uses as much as digits as its factorization.

340340123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 340340123 is about 18448.3094889478. The cubic root of 340340123 is about 698.1858623607.

Adding to 340340123 its reverse (321043043), we get a palindrome (661383166).

The spelling of 340340123 in words is "three hundred forty million, three hundred forty thousand, one hundred twenty-three".