689484905 has 32 divisors (see below), whose sum is σ = 868589568. Its totient is φ = 524966400.

The previous prime is 689484881. The next prime is 689484907. The reversal of 689484905 is 509484986.

It is a happy number.

It is not a de Polignac number, because 689484905 - 2¹⁰ = 689483881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (689484907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1848299 + ... + 1848671.

It is an arithmetic number, because the mean of its divisors is an integer number (27143424).

Almost surely, 2^689484905 is an apocalyptic number.

It is an amenable number.

689484905 is a deficient number, since it is larger than the sum of its proper divisors (179104663).

689484905 is a wasteful number, since it uses less digits than its factorization.

689484905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 689484905 is about 26258.0445768530. The cubic root of 689484905 is about 883.4356502659.

The spelling of 689484905 in words is "six hundred eighty-nine million, four hundred eighty-four thousand, nine hundred five".