123120617 has 2 divisors, whose sum is σ = 123120618. Its totient is φ = 123120616.

The previous prime is 123120601. The next prime is 123120649. The reversal of 123120617 is 716021321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122235136 + 885481 = 11056^2 + 941^2 .

It is a cyclic number.

It is not a de Polignac number, because 123120617 - 2⁴ = 123120601 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 123120592 and 123120601.

It is not a weakly prime, because it can be changed into another prime (123120677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61560308 + 61560309.

It is an arithmetic number, because the mean of its divisors is an integer number (61560309).

Almost surely, 2^123120617 is an apocalyptic number.

It is an amenable number.

123120617 is a deficient number, since it is larger than the sum of its proper divisors (1).

123120617 is an equidigital number, since it uses as much as digits as its factorization.

123120617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 123120617 is about 11095.9730082584. The cubic root of 123120617 is about 497.4814915296.

Adding to 123120617 its reverse (716021321), we get a palindrome (839141938).

The spelling of 123120617 in words is "one hundred twenty-three million, one hundred twenty thousand, six hundred seventeen".