340135123 has 2 divisors, whose sum is σ = 340135124. Its totient is φ = 340135122.

The previous prime is 340135121. The next prime is 340135129. The reversal of 340135123 is 321531043.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 340135123 - 2¹ = 340135121 is a prime.

Together with 340135121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 340135094 and 340135103.

It is not a weakly prime, because it can be changed into another prime (340135121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170067561 + 170067562.

It is an arithmetic number, because the mean of its divisors is an integer number (170067562).

Almost surely, 2^340135123 is an apocalyptic number.

340135123 is a deficient number, since it is larger than the sum of its proper divisors (1).

340135123 is an equidigital number, since it uses as much as digits as its factorization.

340135123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 340135123 is about 18442.7525873987. The cubic root of 340135123 is about 698.0456527694.

Adding to 340135123 its reverse (321531043), we get a palindrome (661666166).

The spelling of 340135123 in words is "three hundred forty million, one hundred thirty-five thousand, one hundred twenty-three".