538709 has 2 divisors, whose sum is σ = 538710. Its totient is φ = 538708.

The previous prime is 538697. The next prime is 538711. The reversal of 538709 is 907835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485809 + 52900 = 697^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 538709 - 2¹⁶ = 473173 is a prime.

Together with 538711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269354 + 269355.

It is an arithmetic number, because the mean of its divisors is an integer number (269355).

2⁵³⁸⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

538709 is a deficient number, since it is larger than the sum of its proper divisors (1).

538709 is an equidigital number, since it uses as much as digits as its factorization.

538709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 538709 is about 733.9679829529. The cubic root of 538709 is about 81.3675820258.

The spelling of 538709 in words is "five hundred thirty-eight thousand, seven hundred nine".