538573381 has 2 divisors, whose sum is σ = 538573382. Its totient is φ = 538573380.

The previous prime is 538573367. The next prime is 538573433. The reversal of 538573381 is 183375835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376010881 + 162562500 = 19391^2 + 12750^2 .

It is a cyclic number.

It is not a de Polignac number, because 538573381 - 2¹¹ = 538571333 is a prime.

It is a super-2 number, since 2×538573381² = 580122573443542322, which contains 22 as substring.

It is equal to p_28277368 and since 538573381 and 28277368 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538573351) 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, 269286690 + 269286691.

It is an arithmetic number, because the mean of its divisors is an integer number (269286691).

Almost surely, 2^538573381 is an apocalyptic number.

It is an amenable number.

538573381 is a deficient number, since it is larger than the sum of its proper divisors (1).

538573381 is an equidigital number, since it uses as much as digits as its factorization.

538573381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 43.

The square root of 538573381 is about 23207.1838231182. The cubic root of 538573381 is about 813.6075340632.

The spelling of 538573381 in words is "five hundred thirty-eight million, five hundred seventy-three thousand, three hundred eighty-one".