689287 has 6 divisors (see below), whose sum is σ = 721112. Its totient is φ = 658812.

The previous prime is 689279. The next prime is 689291. The reversal of 689287 is 782986.

It is not a de Polignac number, because 689287 - 2³ = 689279 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123 + ... + 1180.

2⁶⁸⁹²⁸⁷ is an apocalyptic number.

689287 is a deficient number, since it is larger than the sum of its proper divisors (31825).

689287 is a wasteful number, since it uses less digits than its factorization.

689287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349 (or 1326 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 689287 is about 830.2330997979. The cubic root of 689287 is about 88.3351117082.

The spelling of 689287 in words is "six hundred eighty-nine thousand, two hundred eighty-seven".