705599 has 6 divisors (see below), whose sum is σ = 731640. Its totient is φ = 680456.

The previous prime is 705559. The next prime is 705613. The reversal of 705599 is 995507.

It is a Cunningham number, because it is equal to 840²-1.

It is a de Polignac number, because none of the positive numbers 2^k-705599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705559) 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 5 ways as a sum of consecutive naturals, for example, 422 + ... + 1260.

It is an arithmetic number, because the mean of its divisors is an integer number (121940).

2⁷⁰⁵⁵⁹⁹ is an apocalyptic number.

705599 is a deficient number, since it is larger than the sum of its proper divisors (26041).

705599 is an equidigital number, since it uses as much as digits as its factorization.

705599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 35.

The square root of 705599 is about 839.9994047617. Note that the first 3 decimals coincide. The cubic root of 705599 is about 89.0265039105.

The spelling of 705599 in words is "seven hundred five thousand, five hundred ninety-nine".