689901 has 8 divisors (see below), whose sum is σ = 937440. Its totient is φ = 451152.

The previous prime is 689893. The next prime is 689903. The reversal of 689901 is 109986.

It is a happy number.

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

It is not a de Polignac number, because 689901 - 2³ = 689893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689903) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2011 + ... + 2328.

It is an arithmetic number, because the mean of its divisors is an integer number (117180).

2⁶⁸⁹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

689901 is a deficient number, since it is larger than the sum of its proper divisors (247539).

689901 is a wasteful number, since it uses less digits than its factorization.

689901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4395.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 689901 is about 830.6027931569. The cubic root of 689901 is about 88.3613328430.

The spelling of 689901 in words is "six hundred eighty-nine thousand, nine hundred one".