689401 has 8 divisors (see below), whose sum is σ = 738720. Its totient is φ = 641088.

The previous prime is 689393. The next prime is 689411. The reversal of 689401 is 104986.

689401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 689401 - 2³ = 689393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1630 + ... + 2008.

It is an arithmetic number, because the mean of its divisors is an integer number (92340).

2⁶⁸⁹⁴⁰¹ is an apocalyptic number.

It is an amenable number.

689401 is a deficient number, since it is larger than the sum of its proper divisors (49319).

689401 is a wasteful number, since it uses less digits than its factorization.

689401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 689401 is about 830.3017523768. The cubic root of 689401 is about 88.3399813042.

The spelling of 689401 in words is "six hundred eighty-nine thousand, four hundred one".