491894 has 8 divisors (see below), whose sum is σ = 794640. Its totient is φ = 227016.

The previous prime is 491873. The next prime is 491899. The reversal of 491894 is 498194.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491899) by changing a digit.

491894 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9434 + ... + 9485.

It is an arithmetic number, because the mean of its divisors is an integer number (99330).

2⁴⁹¹⁸⁹⁴ is an apocalyptic number.

491894 is a deficient number, since it is larger than the sum of its proper divisors (302746).

491894 is a wasteful number, since it uses less digits than its factorization.

491894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18934.

The product of its digits is 10368, while the sum is 35.

The square root of 491894 is about 701.3515523616. The cubic root of 491894 is about 78.9387978688.

The spelling of 491894 in words is "four hundred ninety-one thousand, eight hundred ninety-four".