690706 has 8 divisors (see below), whose sum is σ = 1041084. Its totient is φ = 343680.

The previous prime is 690689. The next prime is 690719. The reversal of 690706 is 607096.

It can be written as a sum of positive squares in 2 ways, for example, as 625681 + 65025 = 791^2 + 255^2 .

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

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 235 + ... + 1198.

2⁶⁹⁰⁷⁰⁶ is an apocalyptic number.

690706 is a deficient number, since it is larger than the sum of its proper divisors (350378).

690706 is a wasteful number, since it uses less digits than its factorization.

690706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676.

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

The square root of 690706 is about 831.0872397047. The cubic root of 690706 is about 88.3956871561.

The spelling of 690706 in words is "six hundred ninety thousand, seven hundred six".