503125609 has 4 divisors (see below), whose sum is σ = 575000704. Its totient is φ = 431250516.

The previous prime is 503125583. The next prime is 503125619. The reversal of 503125609 is 906521305.

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 503125609 - 2⁵ = 503125577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503125619) 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, 35937537 + ... + 35937550.

It is an arithmetic number, because the mean of its divisors is an integer number (143750176).

Almost surely, 2^503125609 is an apocalyptic number.

It is an amenable number.

503125609 is a deficient number, since it is larger than the sum of its proper divisors (71875095).

503125609 is an equidigital number, since it uses as much as digits as its factorization.

503125609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71875094.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 503125609 is about 22430.4616314511. The cubic root of 503125609 is about 795.3509566842.

The spelling of 503125609 in words is "five hundred three million, one hundred twenty-five thousand, six hundred nine".