689397 has 4 divisors (see below), whose sum is σ = 919200. Its totient is φ = 459596.

The previous prime is 689393. The next prime is 689411. The reversal of 689397 is 793986.

It is a happy number.

689397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 689397 - 2² = 689393 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689393) 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, 114897 + ... + 114902.

It is an arithmetic number, because the mean of its divisors is an integer number (229800).

2⁶⁸⁹³⁹⁷ is an apocalyptic number.

It is an amenable number.

689397 is a deficient number, since it is larger than the sum of its proper divisors (229803).

689397 is a wasteful number, since it uses less digits than its factorization.

689397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229802.

The product of its digits is 81648, while the sum is 42.

The square root of 689397 is about 830.2993436105. The cubic root of 689397 is about 88.3398104502.

The spelling of 689397 in words is "six hundred eighty-nine thousand, three hundred ninety-seven".