689503 has 4 divisors (see below), whose sum is σ = 730080. Its totient is φ = 648928.

The previous prime is 689467. The next prime is 689509. The reversal of 689503 is 305986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305986 = 2 ⋅152993.

It is a cyclic number.

It is not a de Polignac number, because 689503 - 2¹³ = 681311 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20263 + ... + 20296.

It is an arithmetic number, because the mean of its divisors is an integer number (182520).

2⁶⁸⁹⁵⁰³ is an apocalyptic number.

689503 is a deficient number, since it is larger than the sum of its proper divisors (40577).

689503 is a wasteful number, since it uses less digits than its factorization.

689503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40576.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 689503 is about 830.3631735572. The cubic root of 689503 is about 88.3443378561.

The spelling of 689503 in words is "six hundred eighty-nine thousand, five hundred three".