538173817 has 2 divisors, whose sum is σ = 538173818. Its totient is φ = 538173816.

The previous prime is 538173787. The next prime is 538173887. The reversal of 538173817 is 718371835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400440121 + 137733696 = 20011^2 + 11736^2 .

It is a cyclic number.

It is not a de Polignac number, because 538173817 - 2¹¹ = 538171769 is a prime.

It is not a weakly prime, because it can be changed into another prime (538173887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269086908 + 269086909.

It is an arithmetic number, because the mean of its divisors is an integer number (269086909).

Almost surely, 2^538173817 is an apocalyptic number.

It is an amenable number.

538173817 is a deficient number, since it is larger than the sum of its proper divisors (1).

538173817 is an equidigital number, since it uses as much as digits as its factorization.

538173817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 43.

The square root of 538173817 is about 23198.5735983918. The cubic root of 538173817 is about 813.4062809508.

The spelling of 538173817 in words is "five hundred thirty-eight million, one hundred seventy-three thousand, eight hundred seventeen".