706690 has 16 divisors (see below), whose sum is σ = 1347192. Its totient is φ = 265984.

The previous prime is 706679. The next prime is 706703. The reversal of 706690 is 96607.

It can be written as a sum of positive squares in 4 ways, for example, as 628849 + 77841 = 793^2 + 279^2 .

It is a super-2 number, since 2×706690² = 998821512200, which contains 22 as substring.

It is a plaindrome in base 14.

It is an unprimeable number.

706690 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1909 + ... + 2248.

2⁷⁰⁶⁶⁹⁰ is an apocalyptic number.

706690 is a deficient number, since it is larger than the sum of its proper divisors (640502).

706690 is a wasteful number, since it uses less digits than its factorization.

706690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 706690 is about 840.6485591494. The cubic root of 706690 is about 89.0723646609.

The spelling of 706690 in words is "seven hundred six thousand, six hundred ninety".