491353 has 2 divisors, whose sum is σ = 491354. Its totient is φ = 491352.

The previous prime is 491341. The next prime is 491357. The reversal of 491353 is 353194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258064 + 233289 = 508^2 + 483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491353 is a prime.

It is an Ulam number.

491353 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (491357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245676 + 245677.

It is an arithmetic number, because the mean of its divisors is an integer number (245677).

2⁴⁹¹³⁵³ is an apocalyptic number.

It is an amenable number.

491353 is a deficient number, since it is larger than the sum of its proper divisors (1).

491353 is an equidigital number, since it uses as much as digits as its factorization.

491353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 25.

The square root of 491353 is about 700.9657623593. The cubic root of 491353 is about 78.9098474882.

The spelling of 491353 in words is "four hundred ninety-one thousand, three hundred fifty-three".