509947297 has 2 divisors, whose sum is σ = 509947298. Its totient is φ = 509947296.

The previous prime is 509947261. The next prime is 509947301. The reversal of 509947297 is 792749905.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362178961 + 147768336 = 19031^2 + 12156^2 .

It is a cyclic number.

It is not a de Polignac number, because 509947297 - 2²⁷ = 375729569 is a prime.

It is a super-3 number, since 3×509947297³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (509947247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254973648 + 254973649.

It is an arithmetic number, because the mean of its divisors is an integer number (254973649).

Almost surely, 2^509947297 is an apocalyptic number.

It is an amenable number.

509947297 is a deficient number, since it is larger than the sum of its proper divisors (1).

509947297 is an equidigital number, since it uses as much as digits as its factorization.

509947297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1428840, while the sum is 52.

The square root of 509947297 is about 22582.0126870924. The cubic root of 509947297 is about 798.9294519017.

The spelling of 509947297 in words is "five hundred nine million, nine hundred forty-seven thousand, two hundred ninety-seven".