491357 has 2 divisors, whose sum is σ = 491358. Its totient is φ = 491356.

The previous prime is 491353. The next prime is 491371. The reversal of 491357 is 753194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401956 + 89401 = 634^2 + 299^2 .

It is a cyclic number.

It is not a de Polignac number, because 491357 - 2² = 491353 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491357.

It is not a weakly prime, because it can be changed into another prime (491353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245678 + 245679.

It is an arithmetic number, because the mean of its divisors is an integer number (245679).

2⁴⁹¹³⁵⁷ is an apocalyptic number.

It is an amenable number.

491357 is a deficient number, since it is larger than the sum of its proper divisors (1).

491357 is an equidigital number, since it uses as much as digits as its factorization.

491357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 29.

The square root of 491357 is about 700.9686155599. The cubic root of 491357 is about 78.9100616170.

It can be divided in two parts, 491 and 357, that added together give a palindrome (848).

The spelling of 491357 in words is "four hundred ninety-one thousand, three hundred fifty-seven".