491197 has 8 divisors (see below), whose sum is σ = 573696. Its totient is φ = 411792.

The previous prime is 491171. The next prime is 491201. The reversal of 491197 is 791194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491197 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418 + ... + 1075.

It is an arithmetic number, because the mean of its divisors is an integer number (71712).

2⁴⁹¹¹⁹⁷ is an apocalyptic number.

491197 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

491197 is a deficient number, since it is larger than the sum of its proper divisors (82499).

491197 is a wasteful number, since it uses less digits than its factorization.

491197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547.

The product of its digits is 2268, while the sum is 31.

The square root of 491197 is about 700.8544784761. The cubic root of 491197 is about 78.9014955571.

It can be divided in two parts, 49 and 1197, that multiplied together give a triangular number (58653 = T₃₄₂).

The spelling of 491197 in words is "four hundred ninety-one thousand, one hundred ninety-seven".