503530073 has 4 divisors (see below), whose sum is σ = 504039168. Its totient is φ = 503020980.

The previous prime is 503530067. The next prime is 503530133. The reversal of 503530073 is 370035305.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 503530073 - 2¹² = 503525977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (503530063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253061 + ... + 255042.

It is an arithmetic number, because the mean of its divisors is an integer number (126009792).

Almost surely, 2^503530073 is an apocalyptic number.

It is an amenable number.

503530073 is a deficient number, since it is larger than the sum of its proper divisors (509095).

503530073 is an equidigital number, since it uses as much as digits as its factorization.

503530073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509094.

The product of its (nonzero) digits is 4725, while the sum is 26.

The square root of 503530073 is about 22439.4757737341. The cubic root of 503530073 is about 795.5640278400.

Adding to 503530073 its reverse (370035305), we get a palindrome (873565378).

The spelling of 503530073 in words is "five hundred three million, five hundred thirty thousand, seventy-three".