706591 has 4 divisors (see below), whose sum is σ = 743800. Its totient is φ = 669384.

The previous prime is 706561. The next prime is 706597. The reversal of 706591 is 195607.

It is a happy number.

706591 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: 195607 = 43 ⋅4549.

It is a cyclic number.

It is not a de Polignac number, because 706591 - 2⁷ = 706463 is a prime.

It is an Ulam number.

It is a Duffinian number.

706591 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706597) 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, 18576 + ... + 18613.

It is an arithmetic number, because the mean of its divisors is an integer number (185950).

2⁷⁰⁶⁵⁹¹ is an apocalyptic number.

706591 is a deficient number, since it is larger than the sum of its proper divisors (37209).

706591 is a wasteful number, since it uses less digits than its factorization.

706591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37208.

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

The square root of 706591 is about 840.5896739789. The cubic root of 706591 is about 89.0682050926.

The spelling of 706591 in words is "seven hundred six thousand, five hundred ninety-one".