705239 has 4 divisors (see below), whose sum is σ = 706920. Its totient is φ = 703560.

The previous prime is 705209. The next prime is 705247. The reversal of 705239 is 932507.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 932507 = 61 ⋅15287.

It is a cyclic number.

It is not a de Polignac number, because 705239 - 2⁸ = 704983 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 (705209) 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, 392 + ... + 1250.

It is an arithmetic number, because the mean of its divisors is an integer number (176730).

2⁷⁰⁵²³⁹ is an apocalyptic number.

705239 is a deficient number, since it is larger than the sum of its proper divisors (1681).

705239 is an equidigital number, since it uses as much as digits as its factorization.

705239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 705239 is about 839.7850915562. The cubic root of 705239 is about 89.0113607515.

The spelling of 705239 in words is "seven hundred five thousand, two hundred thirty-nine".