689233 has 2 divisors, whose sum is σ = 689234. Its totient is φ = 689232.

The previous prime is 689219. The next prime is 689237. The reversal of 689233 is 332986.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394384 + 294849 = 628^2 + 543^2 .

It is a cyclic number.

It is not a de Polignac number, because 689233 - 2⁵ = 689201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 689195 and 689204.

It is not a weakly prime, because it can be changed into another prime (689237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344616 + 344617.

It is an arithmetic number, because the mean of its divisors is an integer number (344617).

2⁶⁸⁹²³³ is an apocalyptic number.

It is an amenable number.

689233 is a deficient number, since it is larger than the sum of its proper divisors (1).

689233 is an equidigital number, since it uses as much as digits as its factorization.

689233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 689233 is about 830.2005781737. The cubic root of 689233 is about 88.3328048701.

The spelling of 689233 in words is "six hundred eighty-nine thousand, two hundred thirty-three".