689087 has 12 divisors (see below), whose sum is σ = 823536. Its totient is φ = 576240.

The previous prime is 689081. The next prime is 689089. The reversal of 689087 is 780986.

It is not a de Polignac number, because 689087 - 2⁴ = 689071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 689087.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689087.

It is not an unprimeable number, because it can be changed into a prime (689081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16787 + ... + 16827.

It is an arithmetic number, because the mean of its divisors is an integer number (68628).

2⁶⁸⁹⁰⁸⁷ is an apocalyptic number.

689087 is a deficient number, since it is larger than the sum of its proper divisors (134449).

689087 is an frugal number, since it uses more digits than its factorization.

689087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 689087 is about 830.1126429588. The cubic root of 689087 is about 88.3265672599.

The spelling of 689087 in words is "six hundred eighty-nine thousand, eighty-seven".