491704 has 8 divisors (see below), whose sum is σ = 921960. Its totient is φ = 245848.

The previous prime is 491677. The next prime is 491707. The reversal of 491704 is 407194.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30724 + ... + 30739.

It is an arithmetic number, because the mean of its divisors is an integer number (115245).

2⁴⁹¹⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

491704 is a deficient number, since it is larger than the sum of its proper divisors (430256).

491704 is a wasteful number, since it uses less digits than its factorization.

491704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61469 (or 61465 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 491704 is about 701.2160865240. The cubic root of 491704 is about 78.9286328718.

Adding to 491704 its reverse (407194), we get a palindrome (898898).

The spelling of 491704 in words is "four hundred ninety-one thousand, seven hundred four".