704391 has 8 divisors (see below), whose sum is σ = 952704. Its totient is φ = 462840.

The previous prime is 704357. The next prime is 704393. The reversal of 704391 is 193407.

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

It is a de Polignac number, because none of the positive numbers 2^k-704391 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

704391 is a lucky number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (704393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1441 + ... + 1866.

It is an arithmetic number, because the mean of its divisors is an integer number (119088).

2⁷⁰⁴³⁹¹ is an apocalyptic number.

704391 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

704391 is a deficient number, since it is larger than the sum of its proper divisors (248313).

704391 is a wasteful number, since it uses less digits than its factorization.

704391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 704391 is about 839.2800486131. The cubic root of 704391 is about 88.9756698212.

Adding to 704391 its reverse (193407), we get a palindrome (897798).

The spelling of 704391 in words is "seven hundred four thousand, three hundred ninety-one".