123749063573 has 2 divisors, whose sum is σ = 123749063574. Its totient is φ = 123749063572.

The previous prime is 123749063561. The next prime is 123749063621. The reversal of 123749063573 is 375360947321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81297406129 + 42451657444 = 285127^2 + 206038^2 .

It is a cyclic number.

It is not a de Polignac number, because 123749063573 - 2³⁶ = 55029586837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123749063873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61874531786 + 61874531787.

It is an arithmetic number, because the mean of its divisors is an integer number (61874531787).

Almost surely, 2^123749063573 is an apocalyptic number.

It is an amenable number.

123749063573 is a deficient number, since it is larger than the sum of its proper divisors (1).

123749063573 is an equidigital number, since it uses as much as digits as its factorization.

123749063573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2857680, while the sum is 50.

The spelling of 123749063573 in words is "one hundred twenty-three billion, seven hundred forty-nine million, sixty-three thousand, five hundred seventy-three".