491403 has 8 divisors (see below), whose sum is σ = 714816. Its totient is φ = 297800.

The previous prime is 491377. The next prime is 491417. The reversal of 491403 is 304194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491403 - 2⁵ = 491371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491403.

It is not an unprimeable number, because it can be changed into a prime (491423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7413 + ... + 7478.

It is an arithmetic number, because the mean of its divisors is an integer number (89352).

2⁴⁹¹⁴⁰³ is an apocalyptic number.

491403 is a deficient number, since it is larger than the sum of its proper divisors (223413).

491403 is a wasteful number, since it uses less digits than its factorization.

491403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14905.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 491403 is about 701.0014265321. The cubic root of 491403 is about 78.9125240151.

Adding to 491403 its reverse (304194), we get a palindrome (795597).

The spelling of 491403 in words is "four hundred ninety-one thousand, four hundred three".