509947253 has 2 divisors, whose sum is σ = 509947254. Its totient is φ = 509947252.

The previous prime is 509947247. The next prime is 509947261. The reversal of 509947253 is 352749905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 509946724 + 529 = 22582^2 + 23^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509947253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509947853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254973626 + 254973627.

It is an arithmetic number, because the mean of its divisors is an integer number (254973627).

Almost surely, 2^509947253 is an apocalyptic number.

It is an amenable number.

509947253 is a deficient number, since it is larger than the sum of its proper divisors (1).

509947253 is an equidigital number, since it uses as much as digits as its factorization.

509947253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 509947253 is about 22582.0117128656. The cubic root of 509947253 is about 798.9294289235.

The spelling of 509947253 in words is "five hundred nine million, nine hundred forty-seven thousand, two hundred fifty-three".