538138771 has 2 divisors, whose sum is σ = 538138772. Its totient is φ = 538138770.

The previous prime is 538138763. The next prime is 538138801. The reversal of 538138771 is 177831835.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 538138771 - 2³ = 538138763 is a prime.

It is equal to p_28255867 and since 538138771 and 28255867 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (538138721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269069385 + 269069386.

It is an arithmetic number, because the mean of its divisors is an integer number (269069386).

Almost surely, 2^538138771 is an apocalyptic number.

538138771 is a deficient number, since it is larger than the sum of its proper divisors (1).

538138771 is an equidigital number, since it uses as much as digits as its factorization.

538138771 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 538138771 is about 23197.8182379292. The cubic root of 538138771 is about 813.3886241675.

The spelling of 538138771 in words is "five hundred thirty-eight million, one hundred thirty-eight thousand, seven hundred seventy-one".