491453 has 4 divisors (see below), whose sum is σ = 520380. Its totient is φ = 462528.

The previous prime is 491429. The next prime is 491461. The reversal of 491453 is 354194.

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

It can be written as a sum of positive squares in 2 ways, for example, as 458329 + 33124 = 677^2 + 182^2 .

It is a cyclic number.

It is not a de Polignac number, because 491453 - 2¹⁸ = 229309 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 (491423) 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, 14438 + ... + 14471.

It is an arithmetic number, because the mean of its divisors is an integer number (130095).

2⁴⁹¹⁴⁵³ is an apocalyptic number.

It is an amenable number.

491453 is a deficient number, since it is larger than the sum of its proper divisors (28927).

491453 is a wasteful number, since it uses less digits than its factorization.

491453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28926.

The product of its digits is 2160, while the sum is 26.

The square root of 491453 is about 701.0370888905. The cubic root of 491453 is about 78.9152003604.

The spelling of 491453 in words is "four hundred ninety-one thousand, four hundred fifty-three".