234640123 has 2 divisors, whose sum is σ = 234640124. Its totient is φ = 234640122.

The previous prime is 234640117. The next prime is 234640127. The reversal of 234640123 is 321046432.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 234640123 - 2²¹ = 232542971 is a prime.

It is not a weakly prime, because it can be changed into another prime (234640127) 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, 117320061 + 117320062.

It is an arithmetic number, because the mean of its divisors is an integer number (117320062).

Almost surely, 2^234640123 is an apocalyptic number.

234640123 is a deficient number, since it is larger than the sum of its proper divisors (1).

234640123 is an equidigital number, since it uses as much as digits as its factorization.

234640123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 234640123 is about 15317.9673259868. The cubic root of 234640123 is about 616.7854108157.

Adding to 234640123 its reverse (321046432), we get a palindrome (555686555).

The spelling of 234640123 in words is "two hundred thirty-four million, six hundred forty thousand, one hundred twenty-three".