705447 has 12 divisors (see below), whose sum is σ = 1030224. Its totient is φ = 465120.

The previous prime is 705437. The next prime is 705461. The reversal of 705447 is 744507.

It is not a de Polignac number, because 705447 - 2⁸ = 705191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 705447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 547 + ... + 1307.

It is an arithmetic number, because the mean of its divisors is an integer number (85852).

2⁷⁰⁵⁴⁴⁷ is an apocalyptic number.

705447 is a deficient number, since it is larger than the sum of its proper divisors (324777).

705447 is a wasteful number, since it uses less digits than its factorization.

705447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 705447 is about 839.9089236340. The cubic root of 705447 is about 89.0201107607.

Subtracting 705447 from its reverse (744507), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 705447 in words is "seven hundred five thousand, four hundred forty-seven".