123721746255673 has 2 divisors, whose sum is σ = 123721746255674. Its totient is φ = 123721746255672.

The previous prime is 123721746255641. The next prime is 123721746255799. The reversal of 123721746255673 is 376552647127321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121584849008704 + 2136897246969 = 11026552^2 + 1461813^2 .

It is a cyclic number.

It is not a de Polignac number, because 123721746255673 - 2⁵ = 123721746255641 is a prime.

It is not a weakly prime, because it can be changed into another prime (123721746655673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61860873127836 + 61860873127837.

It is an arithmetic number, because the mean of its divisors is an integer number (61860873127837).

Almost surely, 2^{123721746255673} is an apocalyptic number.

It is an amenable number.

123721746255673 is a deficient number, since it is larger than the sum of its proper divisors (1).

123721746255673 is an equidigital number, since it uses as much as digits as its factorization.

123721746255673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88905600, while the sum is 61.

The spelling of 123721746255673 in words is "one hundred twenty-three trillion, seven hundred twenty-one billion, seven hundred forty-six million, two hundred fifty-five thousand, six hundred seventy-three".