689498 has 4 divisors (see below), whose sum is σ = 1034250. Its totient is φ = 344748.

The previous prime is 689467. The next prime is 689509. The reversal of 689498 is 894986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 635209 + 54289 = 797^2 + 233^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172373 + ... + 172376.

2⁶⁸⁹⁴⁹⁸ is an apocalyptic number.

689498 is a deficient number, since it is larger than the sum of its proper divisors (344752).

689498 is a wasteful number, since it uses less digits than its factorization.

689498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344751.

The product of its digits is 124416, while the sum is 44.

The square root of 689498 is about 830.3601628209. The cubic root of 689498 is about 88.3441243096.

The spelling of 689498 in words is "six hundred eighty-nine thousand, four hundred ninety-eight".