123040964173 has 2 divisors, whose sum is σ = 123040964174. Its totient is φ = 123040964172.

The previous prime is 123040964149. The next prime is 123040964177. The reversal of 123040964173 is 371469040321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70417521769 + 52623442404 = 265363^2 + 229398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123040964173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123040964177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61520482086 + 61520482087.

It is an arithmetic number, because the mean of its divisors is an integer number (61520482087).

Almost surely, 2^123040964173 is an apocalyptic number.

It is an amenable number.

123040964173 is a deficient number, since it is larger than the sum of its proper divisors (1).

123040964173 is an equidigital number, since it uses as much as digits as its factorization.

123040964173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 123040964173 in words is "one hundred twenty-three billion, forty million, nine hundred sixty-four thousand, one hundred seventy-three".