689217 has 4 divisors (see below), whose sum is σ = 918960. Its totient is φ = 459476.

The previous prime is 689201. The next prime is 689219. The reversal of 689217 is 712986.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 689217 - 2⁴ = 689201 is a prime.

It is a D-number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689217.

It is not an unprimeable number, because it can be changed into a prime (689219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114867 + ... + 114872.

It is an arithmetic number, because the mean of its divisors is an integer number (229740).

2⁶⁸⁹²¹⁷ is an apocalyptic number.

It is an amenable number.

689217 is a deficient number, since it is larger than the sum of its proper divisors (229743).

689217 is a wasteful number, since it uses less digits than its factorization.

689217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229742.

The product of its digits is 6048, while the sum is 33.

The square root of 689217 is about 830.1909418923. The cubic root of 689217 is about 88.3321213393.

The spelling of 689217 in words is "six hundred eighty-nine thousand, two hundred seventeen".