491137 has 2 divisors, whose sum is σ = 491138.
Its totient is φ = 491136.
The previous prime is 491129. The next prime is 491149. The reversal of 491137 is 731194.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 389376 + 101761 = 624^2 + 319^2
It is a cyclic number.
It is not a de Polignac number, because 491137 - 23 = 491129 is a prime.
It is not a weakly prime, because it can be changed into another prime (491167) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245568 + 245569.
It is an arithmetic number, because the mean of its divisors is an integer number (245569).
2491137 is an apocalyptic number.
It is an amenable number.
491137 is a deficient number, since it is larger than the sum of its proper divisors (1).
491137 is an equidigital number, since it uses as much as digits as its factorization.
491137 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 491137 is about 700.8116722772.
The cubic root of 491137 is about 78.8982828050.
The spelling of 491137 in words is "four hundred ninety-one thousand, one hundred thirty-seven".