491371 has 2 divisors, whose sum is σ = 491372. Its totient is φ = 491370.

The previous prime is 491357. The next prime is 491377. The reversal of 491371 is 173194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491371 - 2⁵ = 491339 is a prime.

It is not a weakly prime, because it can be changed into another prime (491377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245685 + 245686.

It is an arithmetic number, because the mean of its divisors is an integer number (245686).

2⁴⁹¹³⁷¹ is an apocalyptic number.

491371 is a deficient number, since it is larger than the sum of its proper divisors (1).

491371 is an equidigital number, since it uses as much as digits as its factorization.

491371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

The square root of 491371 is about 700.9786016706. The cubic root of 491371 is about 78.9108110588.

The spelling of 491371 in words is "four hundred ninety-one thousand, three hundred seventy-one".