689630 has 8 divisors (see below), whose sum is σ = 1241352. Its totient is φ = 275848.

The previous prime is 689629. The next prime is 689641. The reversal of 689630 is 36986.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34472 + ... + 34491.

It is an arithmetic number, because the mean of its divisors is an integer number (155169).

2⁶⁸⁹⁶³⁰ is an apocalyptic number.

689630 is a deficient number, since it is larger than the sum of its proper divisors (551722).

689630 is a wasteful number, since it uses less digits than its factorization.

689630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68970.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 689630 is about 830.4396425990. The cubic root of 689630 is about 88.3497615899.

The spelling of 689630 in words is "six hundred eighty-nine thousand, six hundred thirty".