1689533 has 2 divisors, whose sum is σ = 1689534. Its totient is φ = 1689532.

The previous prime is 1689521. The next prime is 1689551. The reversal of 1689533 is 3359861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1493284 + 196249 = 1222^2 + 443^2 .

It is an emirp because it is prime and its reverse (3359861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1689533 - 2⁸ = 1689277 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1689493 and 1689502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1689503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844766 + 844767.

It is an arithmetic number, because the mean of its divisors is an integer number (844767).

2^1689533 is an apocalyptic number.

It is an amenable number.

1689533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689533 is an equidigital number, since it uses as much as digits as its factorization.

1689533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 1689533 is about 1299.8203722053. The cubic root of 1689533 is about 119.1028698788.

It can be divided in two parts, 1689 and 533, that added together give a palindrome (2222).

The spelling of 1689533 in words is "one million, six hundred eighty-nine thousand, five hundred thirty-three".