338871209 has 2 divisors, whose sum is σ = 338871210. Its totient is φ = 338871208.

The previous prime is 338871157. The next prime is 338871263. The reversal of 338871209 is 902178833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260725609 + 78145600 = 16147^2 + 8840^2 .

It is a cyclic number.

It is not a de Polignac number, because 338871209 - 2⁸ = 338870953 is a prime.

It is a super-2 number, since 2×338871209² = 229667392578243362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (338871809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169435604 + 169435605.

It is an arithmetic number, because the mean of its divisors is an integer number (169435605).

Almost surely, 2^338871209 is an apocalyptic number.

It is an amenable number.

338871209 is a deficient number, since it is larger than the sum of its proper divisors (1).

338871209 is an equidigital number, since it uses as much as digits as its factorization.

338871209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 338871209 is about 18408.4548238031. The cubic root of 338871209 is about 697.1799529453.

The spelling of 338871209 in words is "three hundred thirty-eight million, eight hundred seventy-one thousand, two hundred nine".