539873209 has 2 divisors, whose sum is σ = 539873210. Its totient is φ = 539873208.

The previous prime is 539873183. The next prime is 539873221. The reversal of 539873209 is 902378935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474019984 + 65853225 = 21772^2 + 8115^2 .

It is a cyclic number.

It is not a de Polignac number, because 539873209 - 2⁵ = 539873177 is a prime.

It is not a weakly prime, because it can be changed into another prime (539870209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269936604 + 269936605.

It is an arithmetic number, because the mean of its divisors is an integer number (269936605).

Almost surely, 2^539873209 is an apocalyptic number.

It is an amenable number.

539873209 is a deficient number, since it is larger than the sum of its proper divisors (1).

539873209 is an equidigital number, since it uses as much as digits as its factorization.

539873209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 539873209 is about 23235.1718091345. The cubic root of 539873209 is about 814.2615459666.

The spelling of 539873209 in words is "five hundred thirty-nine million, eight hundred seventy-three thousand, two hundred nine".