123550502917 has 2 divisors, whose sum is σ = 123550502918. Its totient is φ = 123550502916.

The previous prime is 123550502909. The next prime is 123550503047. The reversal of 123550502917 is 719205055321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116580590721 + 6969912196 = 341439^2 + 83486^2 .

It is an emirp because it is prime and its reverse (719205055321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123550502917 - 2³ = 123550502909 is a prime.

It is a super-3 number, since 3×123550502917³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123550502917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123550502617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61775251458 + 61775251459.

It is an arithmetic number, because the mean of its divisors is an integer number (61775251459).

Almost surely, 2^123550502917 is an apocalyptic number.

It is an amenable number.

123550502917 is a deficient number, since it is larger than the sum of its proper divisors (1).

123550502917 is an equidigital number, since it uses as much as digits as its factorization.

123550502917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94500, while the sum is 40.

The spelling of 123550502917 in words is "one hundred twenty-three billion, five hundred fifty million, five hundred two thousand, nine hundred seventeen".