704491 has 4 divisors (see below), whose sum is σ = 706552. Its totient is φ = 702432.

The previous prime is 704477. The next prime is 704507. The reversal of 704491 is 194407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194407 = 61 ⋅3187.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-704491 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (704441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381 + ... + 1246.

It is an arithmetic number, because the mean of its divisors is an integer number (176638).

2⁷⁰⁴⁴⁹¹ is an apocalyptic number.

704491 is a deficient number, since it is larger than the sum of its proper divisors (2061).

704491 is a wasteful number, since it uses less digits than its factorization.

704491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060.

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

The square root of 704491 is about 839.3396213691. The cubic root of 704491 is about 88.9798801466.

Adding to 704491 its reverse (194407), we get a palindrome (898898).

The spelling of 704491 in words is "seven hundred four thousand, four hundred ninety-one".