689471312 has 20 divisors (see below), whose sum is σ = 1414430676. Its totient is φ = 324456960.

The previous prime is 689471311. The next prime is 689471351. The reversal of 689471312 is 213174986.

It can be written as a sum of positive squares in 2 ways, for example, as 466387216 + 223084096 = 21596^2 + 14936^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 689471312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689471311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1267139 + ... + 1267682.

Almost surely, 2^689471312 is an apocalyptic number.

It is an amenable number.

689471312 is an abundant number, since it is smaller than the sum of its proper divisors (724959364).

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

689471312 is a wasteful number, since it uses less digits than its factorization.

689471312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534846 (or 2534840 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 689471312 is about 26257.7857406142. The cubic root of 689471312 is about 883.4298446664.

The spelling of 689471312 in words is "six hundred eighty-nine million, four hundred seventy-one thousand, three hundred twelve".