705139 has 4 divisors (see below), whose sum is σ = 710424. Its totient is φ = 699856.

The previous prime is 705137. The next prime is 705161. The reversal of 705139 is 931507.

705139 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: 931507 = 191 ⋅4877.

It is a cyclic number.

It is not a de Polignac number, because 705139 - 2¹ = 705137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705137) 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, 2437 + ... + 2710.

It is an arithmetic number, because the mean of its divisors is an integer number (177606).

2⁷⁰⁵¹³⁹ is an apocalyptic number.

705139 is a deficient number, since it is larger than the sum of its proper divisors (5285).

705139 is a wasteful number, since it uses less digits than its factorization.

705139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 705139 is about 839.7255504032. The cubic root of 705139 is about 89.0071534039.

The spelling of 705139 in words is "seven hundred five thousand, one hundred thirty-nine".