689237 has 2 divisors, whose sum is σ = 689238. Its totient is φ = 689236.

The previous prime is 689233. The next prime is 689257. The reversal of 689237 is 732986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649636 + 39601 = 806^2 + 199^2 .

It is a cyclic number.

It is not a de Polignac number, because 689237 - 2² = 689233 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 689197 and 689206.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689237.

It is not a weakly prime, because it can be changed into another prime (689233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344618 + 344619.

It is an arithmetic number, because the mean of its divisors is an integer number (344619).

2⁶⁸⁹²³⁷ is an apocalyptic number.

It is an amenable number.

689237 is a deficient number, since it is larger than the sum of its proper divisors (1).

689237 is an equidigital number, since it uses as much as digits as its factorization.

689237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 689237 is about 830.2029872266. The cubic root of 689237 is about 88.3329757511.

The spelling of 689237 in words is "six hundred eighty-nine thousand, two hundred thirty-seven".