538130909 has 2 divisors, whose sum is σ = 538130910. Its totient is φ = 538130908.

The previous prime is 538130897. The next prime is 538130911. The reversal of 538130909 is 909031835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311628409 + 226502500 = 17653^2 + 15050^2 .

It is a cyclic number.

It is not a de Polignac number, because 538130909 - 2²⁸ = 269695453 is a prime.

It is a Sophie Germain prime.

Together with 538130911, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538130009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269065454 + 269065455.

It is an arithmetic number, because the mean of its divisors is an integer number (269065455).

Almost surely, 2^538130909 is an apocalyptic number.

It is an amenable number.

538130909 is a deficient number, since it is larger than the sum of its proper divisors (1).

538130909 is an equidigital number, since it uses as much as digits as its factorization.

538130909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 538130909 is about 23197.6487817192. The cubic root of 538130909 is about 813.3846630502.

The spelling of 538130909 in words is "five hundred thirty-eight million, one hundred thirty thousand, nine hundred nine".