123542917 has 2 divisors, whose sum is σ = 123542918. Its totient is φ = 123542916.

The previous prime is 123542869. The next prime is 123542957. The reversal of 123542917 is 719245321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64545156 + 58997761 = 8034^2 + 7681^2 .

It is an emirp because it is prime and its reverse (719245321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123542917 - 2¹⁹ = 123018629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123542957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61771458 + 61771459.

It is an arithmetic number, because the mean of its divisors is an integer number (61771459).

Almost surely, 2^123542917 is an apocalyptic number.

It is an amenable number.

123542917 is a deficient number, since it is larger than the sum of its proper divisors (1).

123542917 is an equidigital number, since it uses as much as digits as its factorization.

123542917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 123542917 is about 11114.9861448407. The cubic root of 123542917 is about 498.0496246307.

The spelling of 123542917 in words is "one hundred twenty-three million, five hundred forty-two thousand, nine hundred seventeen".