706 has 4 divisors (see below), whose sum is σ = 1062.
Its totient is φ = 352.
The previous prime is 701. The next prime is 709. The reversal of 706 is 607.
706 is nontrivially palindromic in base 13 and base 16.
706 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in only one way, i.e., 625 + 81 = 25^2 + 9^2
It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
706 is an undulating number in base 13 and base 16.
It is a plaindrome in base 12.
It is a nialpdrome in base 9 and base 15.
It is not an unprimeable number, because it can be changed into a prime (701) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175 + ... + 178.
706 is a deficient number, since it is larger than the sum of its proper divisors (356).
706 is a wasteful number, since it uses less digits than its factorization.
706 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 355.
The product of its (nonzero) digits is 42, while the sum is 13.
The square root of 706 is about 26.5706605112.
The cubic root of 706 is about 8.9043365644.
Subtracting from 706 its reverse (607), we obtain a palindrome (99).
The spelling of 706 in words is "seven hundred six", and thus it is an aban number and an oban number.