493891 has 4 divisors (see below), whose sum is σ = 495952. Its totient is φ = 491832.

The previous prime is 493877. The next prime is 493897. The reversal of 493891 is 198394.

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 493891 - 2⁵ = 493859 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 (493897) 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, 615 + ... + 1168.

It is an arithmetic number, because the mean of its divisors is an integer number (123988).

2⁴⁹³⁸⁹¹ is an apocalyptic number.

493891 is a deficient number, since it is larger than the sum of its proper divisors (2061).

493891 is a wasteful number, since it uses less digits than its factorization.

493891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060.

The product of its digits is 7776, while the sum is 34.

The square root of 493891 is about 702.7737900633. The cubic root of 493891 is about 79.0454793410.

The spelling of 493891 in words is "four hundred ninety-three thousand, eight hundred ninety-one".