705739 has 4 divisors (see below), whose sum is σ = 711424. Its totient is φ = 700056.

The previous prime is 705737. The next prime is 705751. The reversal of 705739 is 937507.

705739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937507 = 733 ⋅1279.

It is a cyclic number.

It is not a de Polignac number, because 705739 - 2¹ = 705737 is a prime.

It is a super-2 number, since 2×705739² = 996135072242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 705739.

It is not an unprimeable number, because it can be changed into a prime (705737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2652 + ... + 2905.

It is an arithmetic number, because the mean of its divisors is an integer number (177856).

2⁷⁰⁵⁷³⁹ is an apocalyptic number.

705739 is a deficient number, since it is larger than the sum of its proper divisors (5685).

705739 is a wasteful number, since it uses less digits than its factorization.

705739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5684.

The product of its (nonzero) digits is 6615, while the sum is 31.

The square root of 705739 is about 840.0827340209. The cubic root of 705739 is about 89.0323915258.

It can be divided in two parts, 705 and 739, that added together give a square (1444 = 38²).

The spelling of 705739 in words is "seven hundred five thousand, seven hundred thirty-nine".