503891 has 4 divisors (see below), whose sum is σ = 505632. Its totient is φ = 502152.

The previous prime is 503879. The next prime is 503911. The reversal of 503891 is 198305.

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

It is a cyclic number.

It is not a de Polignac number, because 503891 - 2⁶ = 503827 is a prime.

It is a super-2 number, since 2×503891² = 507812279762, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 503891.

It is not an unprimeable number, because it can be changed into a prime (503821) 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, 320 + ... + 1053.

It is an arithmetic number, because the mean of its divisors is an integer number (126408).

2⁵⁰³⁸⁹¹ is an apocalyptic number.

503891 is a deficient number, since it is larger than the sum of its proper divisors (1741).

503891 is a wasteful number, since it uses less digits than its factorization.

503891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 503891 is about 709.8528016427. The cubic root of 503891 is about 79.5754067438.

The spelling of 503891 in words is "five hundred three thousand, eight hundred ninety-one".