123633251173 has 2 divisors, whose sum is σ = 123633251174. Its totient is φ = 123633251172.

The previous prime is 123633251129. The next prime is 123633251249. The reversal of 123633251173 is 371152336321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123599355489 + 33895684 = 351567^2 + 5822^2 .

It is a cyclic number.

It is not a de Polignac number, because 123633251173 - 2¹³ = 123633242981 is a prime.

It is a super-2 number, since 2×123633251173² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123633251113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61816625586 + 61816625587.

It is an arithmetic number, because the mean of its divisors is an integer number (61816625587).

Almost surely, 2^123633251173 is an apocalyptic number.

It is an amenable number.

123633251173 is a deficient number, since it is larger than the sum of its proper divisors (1).

123633251173 is an equidigital number, since it uses as much as digits as its factorization.

123633251173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 37.

Adding to 123633251173 its reverse (371152336321), we get a palindrome (494785587494).

The spelling of 123633251173 in words is "one hundred twenty-three billion, six hundred thirty-three million, two hundred fifty-one thousand, one hundred seventy-three".