338909 has 2 divisors, whose sum is σ = 338910. Its totient is φ = 338908.

The previous prime is 338893. The next prime is 338927. The reversal of 338909 is 909833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235225 + 103684 = 485^2 + 322^2 .

It is an emirp because it is prime and its reverse (909833) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 338909 - 2⁴ = 338893 is a prime.

It is a super-2 number, since 2×338909² = 229718620562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (338959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169454 + 169455.

It is an arithmetic number, because the mean of its divisors is an integer number (169455).

2³³⁸⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

338909 is a deficient number, since it is larger than the sum of its proper divisors (1).

338909 is an equidigital number, since it uses as much as digits as its factorization.

338909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 338909 is about 582.1589130126. The cubic root of 338909 is about 69.7205868541.

The spelling of 338909 in words is "three hundred thirty-eight thousand, nine hundred nine".