538309 has 2 divisors, whose sum is σ = 538310. Its totient is φ = 538308.

The previous prime is 538303. The next prime is 538331. The reversal of 538309 is 903835.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 494209 + 44100 = 703^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 538309 - 2³ = 538301 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269154 + 269155.

It is an arithmetic number, because the mean of its divisors is an integer number (269155).

2⁵³⁸³⁰⁹ is an apocalyptic number.

It is an amenable number.

538309 is a deficient number, since it is larger than the sum of its proper divisors (1).

538309 is an equidigital number, since it uses as much as digits as its factorization.

538309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 538309 is about 733.6954409017. The cubic root of 538309 is about 81.3474381313.

The spelling of 538309 in words is "five hundred thirty-eight thousand, three hundred nine".