538915009 has 2 divisors, whose sum is σ = 538915010. Its totient is φ = 538915008.

The previous prime is 538914997. The next prime is 538915037. The reversal of 538915009 is 900519835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277122609 + 261792400 = 16647^2 + 16180^2 .

It is a cyclic number.

It is not a de Polignac number, because 538915009 - 2¹⁵ = 538882241 is a prime.

It is not a weakly prime, because it can be changed into another prime (538915049) 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, 269457504 + 269457505.

It is an arithmetic number, because the mean of its divisors is an integer number (269457505).

Almost surely, 2^538915009 is an apocalyptic number.

It is an amenable number.

538915009 is a deficient number, since it is larger than the sum of its proper divisors (1).

538915009 is an equidigital number, since it uses as much as digits as its factorization.

538915009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 538915009 is about 23214.5430495627. The cubic root of 538915009 is about 813.7795269461.

The spelling of 538915009 in words is "five hundred thirty-eight million, nine hundred fifteen thousand, nine".