538390117 has 2 divisors, whose sum is σ = 538390118. Its totient is φ = 538390116.

The previous prime is 538390109. The next prime is 538390121. The reversal of 538390117 is 711093835.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481100356 + 57289761 = 21934^2 + 7569^2 .

It is a cyclic number.

It is not a de Polignac number, because 538390117 - 2³ = 538390109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538390157) 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, 269195058 + 269195059.

It is an arithmetic number, because the mean of its divisors is an integer number (269195059).

Almost surely, 2^538390117 is an apocalyptic number.

It is an amenable number.

538390117 is a deficient number, since it is larger than the sum of its proper divisors (1).

538390117 is an equidigital number, since it uses as much as digits as its factorization.

538390117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 538390117 is about 23203.2350546212. The cubic root of 538390117 is about 813.5152396846.

The spelling of 538390117 in words is "five hundred thirty-eight million, three hundred ninety thousand, one hundred seventeen".