491153 has 4 divisors (see below), whose sum is σ = 528948. Its totient is φ = 453360.

The previous prime is 491149. The next prime is 491159. The reversal of 491153 is 351194.

It is a happy number.

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 238144 + 253009 = 488^2 + 503^2 .

It is a cyclic number.

It is not a de Polignac number, because 491153 - 2² = 491149 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491159) 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, 18878 + ... + 18903.

It is an arithmetic number, because the mean of its divisors is an integer number (132237).

2⁴⁹¹¹⁵³ is an apocalyptic number.

It is an amenable number.

491153 is a deficient number, since it is larger than the sum of its proper divisors (37795).

491153 is a wasteful number, since it uses less digits than its factorization.

491153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37794.

The product of its digits is 540, while the sum is 23.

The square root of 491153 is about 700.8230875192. The cubic root of 491153 is about 78.8991395645.

The spelling of 491153 in words is "four hundred ninety-one thousand, one hundred fifty-three".