503704661 has 4 divisors (see below), whose sum is σ = 503793324. Its totient is φ = 503616000.

The previous prime is 503704651. The next prime is 503704681. The reversal of 503704661 is 166407305.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 372258436 + 131446225 = 19294^2 + 11465^2 .

It is a cyclic number.

It is not a de Polignac number, because 503704661 - 2¹⁸ = 503442517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503704651) 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, 35180 + ... + 47381.

It is an arithmetic number, because the mean of its divisors is an integer number (125948331).

Almost surely, 2^503704661 is an apocalyptic number.

It is an amenable number.

503704661 is a deficient number, since it is larger than the sum of its proper divisors (88663).

503704661 is an equidigital number, since it uses as much as digits as its factorization.

503704661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88662.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 503704661 is about 22443.3656344141. The cubic root of 503704661 is about 795.6559653362.

The spelling of 503704661 in words is "five hundred three million, seven hundred four thousand, six hundred sixty-one".