689427 has 6 divisors (see below), whose sum is σ = 995852. Its totient is φ = 459612.

The previous prime is 689411. The next prime is 689431. The reversal of 689427 is 724986.

It is not a de Polignac number, because 689427 - 2⁴ = 689411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689391 and 689400.

It is not an unprimeable number, because it can be changed into a prime (689467) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38293 + ... + 38310.

2⁶⁸⁹⁴²⁷ is an apocalyptic number.

689427 is a deficient number, since it is larger than the sum of its proper divisors (306425).

689427 is a wasteful number, since it uses less digits than its factorization.

689427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76609 (or 76606 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 689427 is about 830.3174091876. The cubic root of 689427 is about 88.3410918386.

The spelling of 689427 in words is "six hundred eighty-nine thousand, four hundred twenty-seven".