684469789 has 8 divisors (see below), whose sum is σ = 709469568. Its totient is φ = 659904960.

The previous prime is 684469787. The next prime is 684469823. The reversal of 684469789 is 987964486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 684469789 - 2¹ = 684469787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684469787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105532 + ... + 111829.

It is an arithmetic number, because the mean of its divisors is an integer number (88683696).

Almost surely, 2^684469789 is an apocalyptic number.

It is an amenable number.

684469789 is a deficient number, since it is larger than the sum of its proper divisors (24999779).

684469789 is a wasteful number, since it uses less digits than its factorization.

684469789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217475.

The product of its digits is 20901888, while the sum is 61.

The square root of 684469789 is about 26162.3735352892. The cubic root of 684469789 is about 881.2884831106.

The spelling of 684469789 in words is "six hundred eighty-four million, four hundred sixty-nine thousand, seven hundred eighty-nine".