509949547 has 2 divisors, whose sum is σ = 509949548. Its totient is φ = 509949546.

The previous prime is 509949541. The next prime is 509949571. The reversal of 509949547 is 745949905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509949547 - 2²⁷ = 375731819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 509949494 and 509949503.

It is not a weakly prime, because it can be changed into another prime (509949541) 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, 254974773 + 254974774.

It is an arithmetic number, because the mean of its divisors is an integer number (254974774).

Almost surely, 2^509949547 is an apocalyptic number.

509949547 is a deficient number, since it is larger than the sum of its proper divisors (1).

509949547 is an equidigital number, since it uses as much as digits as its factorization.

509949547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The square root of 509949547 is about 22582.0625054489. The cubic root of 509949547 is about 798.9306269176.

The spelling of 509949547 in words is "five hundred nine million, nine hundred forty-nine thousand, five hundred forty-seven".