509387273 has 2 divisors, whose sum is σ = 509387274. Its totient is φ = 509387272.

The previous prime is 509387267. The next prime is 509387287. The reversal of 509387273 is 372783905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281165824 + 228221449 = 16768^2 + 15107^2 .

It is a cyclic number.

It is not a de Polignac number, because 509387273 - 2⁶ = 509387209 is a prime.

It is not a weakly prime, because it can be changed into another prime (509387243) 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, 254693636 + 254693637.

It is an arithmetic number, because the mean of its divisors is an integer number (254693637).

Almost surely, 2^509387273 is an apocalyptic number.

It is an amenable number.

509387273 is a deficient number, since it is larger than the sum of its proper divisors (1).

509387273 is an equidigital number, since it uses as much as digits as its factorization.

509387273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 509387273 is about 22569.6095003879. The cubic root of 509387273 is about 798.6368833981.

The spelling of 509387273 in words is "five hundred nine million, three hundred eighty-seven thousand, two hundred seventy-three".