687549332 has 12 divisors (see below), whose sum is σ = 1219694196. Its totient is φ = 339065280.

The previous prime is 687549329. The next prime is 687549347. The reversal of 687549332 is 233945786.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 174345616 + 513203716 = 13204^2 + 22654^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1177019 + ... + 1177602.

It is an arithmetic number, because the mean of its divisors is an integer number (101641183).

Almost surely, 2^687549332 is an apocalyptic number.

It is an amenable number.

687549332 is a deficient number, since it is larger than the sum of its proper divisors (532144864).

687549332 is a wasteful number, since it uses less digits than its factorization.

687549332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354698 (or 2354696 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 47.

The square root of 687549332 is about 26221.1619117079. The cubic root of 687549332 is about 882.6081935259.

The spelling of 687549332 in words is "six hundred eighty-seven million, five hundred forty-nine thousand, three hundred thirty-two".