503530409 has 2 divisors, whose sum is σ = 503530410. Its totient is φ = 503530408.

The previous prime is 503530397. The next prime is 503530439. The reversal of 503530409 is 904035305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 487305625 + 16224784 = 22075^2 + 4028^2 .

It is a cyclic number.

It is not a de Polignac number, because 503530409 - 2¹² = 503526313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (503530439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251765204 + 251765205.

It is an arithmetic number, because the mean of its divisors is an integer number (251765205).

Almost surely, 2^503530409 is an apocalyptic number.

It is an amenable number.

503530409 is a deficient number, since it is larger than the sum of its proper divisors (1).

503530409 is an equidigital number, since it uses as much as digits as its factorization.

503530409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 503530409 is about 22439.4832605388. The cubic root of 503530409 is about 795.5642047970.

The spelling of 503530409 in words is "five hundred three million, five hundred thirty thousand, four hundred nine".