689898 has 16 divisors (see below), whose sum is σ = 1505376. Its totient is φ = 209040.

The previous prime is 689893. The next prime is 689903. The reversal of 689898 is 898986.

689898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (689893) and next prime (689903).

It is a Curzon number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (689891) by changing a digit.

689898 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 7 ways as a sum of consecutive naturals, for example, 5161 + ... + 5292.

It is an arithmetic number, because the mean of its divisors is an integer number (94086).

2⁶⁸⁹⁸⁹⁸ is an apocalyptic number.

689898 is an abundant number, since it is smaller than the sum of its proper divisors (815478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689898 is a wasteful number, since it uses less digits than its factorization.

689898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10469.

The product of its digits is 248832, while the sum is 48.

The square root of 689898 is about 830.6009872376. The cubic root of 689898 is about 88.3612047645.

It can be divided in two parts, 6898 and 98, that added together give a palindrome (6996).

The spelling of 689898 in words is "six hundred eighty-nine thousand, eight hundred ninety-eight".