705391 has 4 divisors (see below), whose sum is σ = 714400. Its totient is φ = 696384.

The previous prime is 705389. The next prime is 705403. The reversal of 705391 is 193507.

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 705391 - 2¹ = 705389 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 (705191) 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, 4386 + ... + 4543.

It is an arithmetic number, because the mean of its divisors is an integer number (178600).

2⁷⁰⁵³⁹¹ is an apocalyptic number.

705391 is a deficient number, since it is larger than the sum of its proper divisors (9009).

705391 is an equidigital number, since it uses as much as digits as its factorization.

705391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9008.

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

The square root of 705391 is about 839.8755860245. The cubic root of 705391 is about 89.0177551582.

Adding to 705391 its reverse (193507), we get a palindrome (898898).

The spelling of 705391 in words is "seven hundred five thousand, three hundred ninety-one".