491794 has 4 divisors (see below), whose sum is σ = 737694. Its totient is φ = 245896.

The previous prime is 491789. The next prime is 491797. The reversal of 491794 is 497194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 497194 = 2 ⋅248597.

It can be written as a sum of positive squares in only one way, i.e., 378225 + 113569 = 615^2 + 337^2 .

It is a super-2 number, since 2×491794² = 483722676872, which contains 22 as substring.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (491797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122947 + ... + 122950.

2⁴⁹¹⁷⁹⁴ is an apocalyptic number.

491794 is a deficient number, since it is larger than the sum of its proper divisors (245900).

491794 is a wasteful number, since it uses less digits than its factorization.

491794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245899.

The product of its digits is 9072, while the sum is 34.

The square root of 491794 is about 701.2802578142. The cubic root of 491794 is about 78.9334481968.

The spelling of 491794 in words is "four hundred ninety-one thousand, seven hundred ninety-four".