123538573 has 2 divisors, whose sum is σ = 123538574. Its totient is φ = 123538572.

The previous prime is 123538561. The next prime is 123538577. The reversal of 123538573 is 375835321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77475204 + 46063369 = 8802^2 + 6787^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123538573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123538577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61769286 + 61769287.

It is an arithmetic number, because the mean of its divisors is an integer number (61769287).

Almost surely, 2^123538573 is an apocalyptic number.

It is an amenable number.

123538573 is a deficient number, since it is larger than the sum of its proper divisors (1).

123538573 is an equidigital number, since it uses as much as digits as its factorization.

123538573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 37.

The square root of 123538573 is about 11114.7907312734. The cubic root of 123538573 is about 498.0437871102.

The spelling of 123538573 in words is "one hundred twenty-three million, five hundred thirty-eight thousand, five hundred seventy-three".