705659 has 4 divisors (see below), whose sum is σ = 708240. Its totient is φ = 703080.

The previous prime is 705643. The next prime is 705689. The reversal of 705659 is 956507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 956507 = 29 ⋅32983.

It is a cyclic number.

It is not a de Polignac number, because 705659 - 2⁴ = 705643 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 705659.

It is not an unprimeable number, because it can be changed into a prime (705689) 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 3 ways as a sum of consecutive naturals, for example, 824 + ... + 1445.

It is an arithmetic number, because the mean of its divisors is an integer number (177060).

2⁷⁰⁵⁶⁵⁹ is an apocalyptic number.

705659 is a deficient number, since it is larger than the sum of its proper divisors (2581).

705659 is a wasteful number, since it uses less digits than its factorization.

705659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 705659 is about 840.0351183135. The cubic root of 705659 is about 89.0290272695.

The spelling of 705659 in words is "seven hundred five thousand, six hundred fifty-nine".