491493 has 8 divisors (see below), whose sum is σ = 659808. Its totient is φ = 325424.

The previous prime is 491489. The next prime is 491497. The reversal of 491493 is 394194.

It is an interprime number because it is at equal distance from previous prime (491489) and next prime (491497).

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

It is a cyclic number.

It is not a de Polignac number, because 491493 - 2² = 491489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491493.

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 491493.

It is not an unprimeable number, because it can be changed into a prime (491497) 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, 46 + ... + 992.

It is an arithmetic number, because the mean of its divisors is an integer number (82476).

2⁴⁹¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

491493 is a deficient number, since it is larger than the sum of its proper divisors (168315).

491493 is a wasteful number, since it uses less digits than its factorization.

491493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123.

The product of its digits is 3888, while the sum is 30.

The square root of 491493 is about 701.0656174710. The cubic root of 491493 is about 78.9173413060.

The spelling of 491493 in words is "four hundred ninety-one thousand, four hundred ninety-three".