689561334 has 144 divisors (see below), whose sum is σ = 1938693120. Its totient is φ = 173210400.

The previous prime is 689561273. The next prime is 689561351. The reversal of 689561334 is 433165986.

689561334 is a `hidden beast` number, since 6 + 89 + 561 + 3 + 3 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 689561334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 471897 + ... + 473355.

Almost surely, 2^689561334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689561334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969346560).

689561334 is an abundant number, since it is smaller than the sum of its proper divisors (1249131786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689561334 is a wasteful number, since it uses less digits than its factorization.

689561334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527 (or 1513 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 689561334 is about 26259.4998809954. The cubic root of 689561334 is about 883.4682918356.

The spelling of 689561334 in words is "six hundred eighty-nine million, five hundred sixty-one thousand, three hundred thirty-four".