689553 has 10 divisors (see below), whose sum is σ = 1030194. Its totient is φ = 459648.

The previous prime is 689551. The next prime is 689561. The reversal of 689553 is 355986.

689553 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 685584 + 3969 = 828^2 + 63^2 .

It is not a de Polignac number, because 689553 - 2¹ = 689551 is a prime.

689553 is strictly pandigital in base 7.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (689551) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4176 + ... + 4337.

2⁶⁸⁹⁵⁵³ is an apocalyptic number.

It is an amenable number.

689553 is a deficient number, since it is larger than the sum of its proper divisors (340641).

689553 is an equidigital number, since it uses as much as digits as its factorization.

689553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8525 (or 8516 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 689553 is about 830.3932803196. The cubic root of 689553 is about 88.3464732638.

The spelling of 689553 in words is "six hundred eighty-nine thousand, five hundred fifty-three".