509345803 has 2 divisors, whose sum is σ = 509345804. Its totient is φ = 509345802.

The previous prime is 509345797. The next prime is 509345807. The reversal of 509345803 is 308543905.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 509345803 - 2¹⁷ = 509214731 is a prime.

It is equal to p_26821738 and since 509345803 and 26821738 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (509345807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254672901 + 254672902.

It is an arithmetic number, because the mean of its divisors is an integer number (254672902).

Almost surely, 2^509345803 is an apocalyptic number.

509345803 is a deficient number, since it is larger than the sum of its proper divisors (1).

509345803 is an equidigital number, since it uses as much as digits as its factorization.

509345803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 509345803 is about 22568.6907684075. The cubic root of 509345803 is about 798.6152100583.

The spelling of 509345803 in words is "five hundred nine million, three hundred forty-five thousand, eight hundred three".