538870121 has 2 divisors, whose sum is σ = 538870122. Its totient is φ = 538870120.

The previous prime is 538870099. The next prime is 538870217. The reversal of 538870121 is 121078835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437646400 + 101223721 = 20920^2 + 10061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538870121 is a prime.

It is equal to p_28292165 and since 538870121 and 28292165 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 (538870621) 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, 269435060 + 269435061.

It is an arithmetic number, because the mean of its divisors is an integer number (269435061).

Almost surely, 2^538870121 is an apocalyptic number.

It is an amenable number.

538870121 is a deficient number, since it is larger than the sum of its proper divisors (1).

538870121 is an equidigital number, since it uses as much as digits as its factorization.

538870121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 538870121 is about 23213.5762216854. The cubic root of 538870121 is about 813.7569321961.

The spelling of 538870121 in words is "five hundred thirty-eight million, eight hundred seventy thousand, one hundred twenty-one".