340220123 has 2 divisors, whose sum is σ = 340220124. Its totient is φ = 340220122.

The previous prime is 340220113. The next prime is 340220149. The reversal of 340220123 is 321022043.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 340220123 - 2⁴ = 340220107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (340220113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170110061 + 170110062.

It is an arithmetic number, because the mean of its divisors is an integer number (170110062).

Almost surely, 2^340220123 is an apocalyptic number.

340220123 is a deficient number, since it is larger than the sum of its proper divisors (1).

340220123 is an equidigital number, since it uses as much as digits as its factorization.

340220123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 340220123 is about 18445.0568716933. The cubic root of 340220123 is about 698.1037952885.

Adding to 340220123 its reverse (321022043), we get a palindrome (661242166).

The spelling of 340220123 in words is "three hundred forty million, two hundred twenty thousand, one hundred twenty-three".