689255489 has 16 divisors (see below), whose sum is σ = 753326784. Its totient is φ = 626808000.

The previous prime is 689255473. The next prime is 689255507. The reversal of 689255489 is 984552986.

It is not a de Polignac number, because 689255489 - 2⁴ = 689255473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689255459) 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 15 ways as a sum of consecutive naturals, for example, 529139 + ... + 530439.

It is an arithmetic number, because the mean of its divisors is an integer number (47082924).

Almost surely, 2^689255489 is an apocalyptic number.

It is an amenable number.

689255489 is a deficient number, since it is larger than the sum of its proper divisors (64071295).

689255489 is a wasteful number, since it uses less digits than its factorization.

689255489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888.

The product of its digits is 6220800, while the sum is 56.

The square root of 689255489 is about 26253.6757236011. The cubic root of 689255489 is about 883.3376559735.

The spelling of 689255489 in words is "six hundred eighty-nine million, two hundred fifty-five thousand, four hundred eighty-nine".