509946523 has 2 divisors, whose sum is σ = 509946524. Its totient is φ = 509946522.

The previous prime is 509946509. The next prime is 509946551. The reversal of 509946523 is 325649905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509946523 - 2⁹ = 509946011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 509946523.

It is not a weakly prime, because it can be changed into another prime (509946583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254973261 + 254973262.

It is an arithmetic number, because the mean of its divisors is an integer number (254973262).

Almost surely, 2^509946523 is an apocalyptic number.

509946523 is a deficient number, since it is larger than the sum of its proper divisors (1).

509946523 is an equidigital number, since it uses as much as digits as its factorization.

509946523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 509946523 is about 22581.9955495523. The cubic root of 509946523 is about 798.9290476954.

The spelling of 509946523 in words is "five hundred nine million, nine hundred forty-six thousand, five hundred twenty-three".