509369723 has 2 divisors, whose sum is σ = 509369724. Its totient is φ = 509369722.

The previous prime is 509369683. The next prime is 509369747. The reversal of 509369723 is 327963905.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 509369723 - 2¹² = 509365627 is a prime.

It is not a weakly prime, because it can be changed into another prime (509369323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254684861 + 254684862.

It is an arithmetic number, because the mean of its divisors is an integer number (254684862).

Almost surely, 2^509369723 is an apocalyptic number.

509369723 is a deficient number, since it is larger than the sum of its proper divisors (1).

509369723 is an equidigital number, since it uses as much as digits as its factorization.

509369723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 44.

The square root of 509369723 is about 22569.2206998824. The cubic root of 509369723 is about 798.6277114386.

The spelling of 509369723 in words is "five hundred nine million, three hundred sixty-nine thousand, seven hundred twenty-three".