689738212 has 24 divisors (see below), whose sum is σ = 1280475000. Its totient is φ = 323965440.

The previous prime is 689738167. The next prime is 689738219. The reversal of 689738212 is 212837986.

It can be written as a sum of positive squares in 4 ways, for example, as 195832036 + 493906176 = 13994^2 + 22224^2 .

It is not an unprimeable number, because it can be changed into a prime (689738219) 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 7 ways as a sum of consecutive naturals, for example, 27414 + ... + 46162.

It is an arithmetic number, because the mean of its divisors is an integer number (53353125).

Almost surely, 2^689738212 is an apocalyptic number.

It is an amenable number.

689738212 is a deficient number, since it is larger than the sum of its proper divisors (590736788).

689738212 is a wasteful number, since it uses less digits than its factorization.

689738212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19311 (or 19309 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 689738212 is about 26262.8675509739. The cubic root of 689738212 is about 883.5438242731.

The spelling of 689738212 in words is "six hundred eighty-nine million, seven hundred thirty-eight thousand, two hundred twelve".