705691 has 8 divisors (see below), whose sum is σ = 818144. Its totient is φ = 596160.

The previous prime is 705689. The next prime is 705713. The reversal of 705691 is 196507.

705691 = 30³ + 31³ + ... + 43³.

It is a happy number.

705691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 705691 - 2¹ = 705689 is a prime.

It is a Duffinian number.

705691 is a modest number, since divided by 5691 gives 7 as remainder.

It is not an unprimeable number, because it can be changed into a prime (705631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180 + ... + 1201.

It is an arithmetic number, because the mean of its divisors is an integer number (102268).

2⁷⁰⁵⁶⁹¹ is an apocalyptic number.

705691 is a deficient number, since it is larger than the sum of its proper divisors (112453).

705691 is a wasteful number, since it uses less digits than its factorization.

705691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 705691 is about 840.0541649203. The cubic root of 705691 is about 89.0303730025.

The spelling of 705691 in words is "seven hundred five thousand, six hundred ninety-one".