123213617 has 2 divisors, whose sum is σ = 123213618. Its totient is φ = 123213616.

The previous prime is 123213611. The next prime is 123213667. The reversal of 123213617 is 716312321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89851441 + 33362176 = 9479^2 + 5776^2 .

It is a cyclic number.

It is not a de Polignac number, because 123213617 - 2¹⁸ = 122951473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123213611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61606808 + 61606809.

It is an arithmetic number, because the mean of its divisors is an integer number (61606809).

Almost surely, 2^123213617 is an apocalyptic number.

It is an amenable number.

123213617 is a deficient number, since it is larger than the sum of its proper divisors (1).

123213617 is an equidigital number, since it uses as much as digits as its factorization.

123213617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 26.

The square root of 123213617 is about 11100.1629267322. The cubic root of 123213617 is about 497.6067186867.

Adding to 123213617 its reverse (716312321), we get a palindrome (839525938).

The spelling of 123213617 in words is "one hundred twenty-three million, two hundred thirteen thousand, six hundred seventeen".