689522 has 8 divisors (see below), whose sum is σ = 1038576. Its totient is φ = 343332.

The previous prime is 689509. The next prime is 689551. The reversal of 689522 is 225986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 6⁷ + 8⁶ + 5⁶ + 9³ + 2⁴ + 2¹⁷ .

It is an unprimeable number.

689522 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (129822).

2⁶⁸⁹⁵²² is an apocalyptic number.

689522 is a deficient number, since it is larger than the sum of its proper divisors (349054).

689522 is a wasteful number, since it uses less digits than its factorization.

689522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432.

The product of its digits is 8640, while the sum is 32.

The square root of 689522 is about 830.3746142555. The cubic root of 689522 is about 88.3451493232.

The spelling of 689522 in words is "six hundred eighty-nine thousand, five hundred twenty-two".