689662 has 8 divisors (see below), whose sum is σ = 1089000. Its totient is φ = 326664.

The previous prime is 689641. The next prime is 689693. The reversal of 689662 is 266986.

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

It is a congruent number.

It is an unprimeable number.

689662 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9037 + ... + 9112.

It is an arithmetic number, because the mean of its divisors is an integer number (136125).

2⁶⁸⁹⁶⁶² is an apocalyptic number.

689662 is a deficient number, since it is larger than the sum of its proper divisors (399338).

689662 is a wasteful number, since it uses less digits than its factorization.

689662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18170.

The product of its digits is 31104, while the sum is 37.

The square root of 689662 is about 830.4589092785. The cubic root of 689662 is about 88.3511280949.

It can be divided in two parts, 68 and 9662, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 689662 in words is "six hundred eighty-nine thousand, six hundred sixty-two".