123542317 has 2 divisors, whose sum is σ = 123542318. Its totient is φ = 123542316.

The previous prime is 123542299. The next prime is 123542327. The reversal of 123542317 is 713245321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88566921 + 34975396 = 9411^2 + 5914^2 .

It is an emirp because it is prime and its reverse (713245321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123542317 - 2⁷ = 123542189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123542327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61771158 + 61771159.

It is an arithmetic number, because the mean of its divisors is an integer number (61771159).

Almost surely, 2^123542317 is an apocalyptic number.

It is an amenable number.

123542317 is a deficient number, since it is larger than the sum of its proper divisors (1).

123542317 is an equidigital number, since it uses as much as digits as its factorization.

123542317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 123542317 is about 11114.9591542209. The cubic root of 123542317 is about 498.0488183515.

Adding to 123542317 its reverse (713245321), we get a palindrome (836787638).

The spelling of 123542317 in words is "one hundred twenty-three million, five hundred forty-two thousand, three hundred seventeen".