689203289 has 4 divisors (see below), whose sum is σ = 689525556. Its totient is φ = 688881024.

The previous prime is 689203261. The next prime is 689203301. The reversal of 689203289 is 982302986.

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

It can be written as a sum of positive squares in 2 ways, for example, as 99102025 + 590101264 = 9955^2 + 24292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689203289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689233289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157904 + ... + 162209.

It is an arithmetic number, because the mean of its divisors is an integer number (172381389).

Almost surely, 2^689203289 is an apocalyptic number.

It is an amenable number.

689203289 is a deficient number, since it is larger than the sum of its proper divisors (322267).

689203289 is a wasteful number, since it uses less digits than its factorization.

689203289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322266.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 689203289 is about 26252.6815582713. The cubic root of 689203289 is about 883.3153558779.

The spelling of 689203289 in words is "six hundred eighty-nine million, two hundred three thousand, two hundred eighty-nine".