491393 has 4 divisors (see below), whose sum is σ = 561600. Its totient is φ = 421188.

The previous prime is 491377. The next prime is 491417. The reversal of 491393 is 393194.

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, and also an emirpimes, since its reverse is a distinct semiprime: 393194 = 2 ⋅196597.

It is a cyclic number.

It is not a de Polignac number, because 491393 - 2⁴ = 491377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491333) 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, 35093 + ... + 35106.

It is an arithmetic number, because the mean of its divisors is an integer number (140400).

2⁴⁹¹³⁹³ is an apocalyptic number.

It is an amenable number.

491393 is a deficient number, since it is larger than the sum of its proper divisors (70207).

491393 is an equidigital number, since it uses as much as digits as its factorization.

491393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70206.

The product of its digits is 2916, while the sum is 29.

The square root of 491393 is about 700.9942938427. The cubic root of 491393 is about 78.9119887242.

The spelling of 491393 in words is "four hundred ninety-one thousand, three hundred ninety-three".