690698 has 8 divisors (see below), whose sum is σ = 1040580. Its totient is φ = 343840.

The previous prime is 690689. The next prime is 690719. The reversal of 690698 is 896096.

It can be written as a sum of positive squares in 2 ways, for example, as 573049 + 117649 = 757^2 + 343^2 .

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

It is a Curzon number.

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, 53 + ... + 1176.

2⁶⁹⁰⁶⁹⁸ is an apocalyptic number.

690698 is a deficient number, since it is larger than the sum of its proper divisors (349882).

690698 is a wasteful number, since it uses less digits than its factorization.

690698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 690698 is about 831.0824267183. The cubic root of 690698 is about 88.3953458781.

The spelling of 690698 in words is "six hundred ninety thousand, six hundred ninety-eight".