503961 has 4 divisors (see below), whose sum is σ = 671952. Its totient is φ = 335972.

The previous prime is 503959. The next prime is 503963. The reversal of 503961 is 169305.

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 an interprime number because it is at equal distance from previous prime (503959) and next prime (503963).

It is a cyclic number.

It is not a de Polignac number, because 503961 - 2¹ = 503959 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (503963) 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, 83991 + ... + 83996.

It is an arithmetic number, because the mean of its divisors is an integer number (167988).

2⁵⁰³⁹⁶¹ is an apocalyptic number.

It is an amenable number.

503961 is a deficient number, since it is larger than the sum of its proper divisors (167991).

503961 is a wasteful number, since it uses less digits than its factorization.

503961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167990.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 503961 is about 709.9021059273. The cubic root of 503961 is about 79.5790914167.

The spelling of 503961 in words is "five hundred three thousand, nine hundred sixty-one".