705407 has 4 divisors (see below), whose sum is σ = 708576. Its totient is φ = 702240.

The previous prime is 705403. The next prime is 705409. The reversal of 705407 is 704507.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 705407 - 2² = 705403 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 (705403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223 + ... + 1704.

It is an arithmetic number, because the mean of its divisors is an integer number (177144).

2⁷⁰⁵⁴⁰⁷ is an apocalyptic number.

705407 is a deficient number, since it is larger than the sum of its proper divisors (3169).

705407 is a wasteful number, since it uses less digits than its factorization.

705407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168.

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 705407 is about 839.8851111908. The cubic root of 705407 is about 89.0184282002.

Subtracting from 705407 its reverse (704507), we obtain a square (900 = 30²).

The spelling of 705407 in words is "seven hundred five thousand, four hundred seven".