687875132 has 18 divisors (see below), whose sum is σ = 1400317632. Its totient is φ = 294803544.

The previous prime is 687875119. The next prime is 687875137. The reversal of 687875132 is 231578786.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687875137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1754588 + ... + 1754979.

It is an arithmetic number, because the mean of its divisors is an integer number (77795424).

Almost surely, 2^687875132 is an apocalyptic number.

It is an amenable number.

687875132 is an abundant number, since it is smaller than the sum of its proper divisors (712442500).

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

687875132 is a wasteful number, since it uses less digits than its factorization.

687875132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3509585 (or 3509576 counting only the distinct ones).

The product of its digits is 564480, while the sum is 47.

The square root of 687875132 is about 26227.3737152617. The cubic root of 687875132 is about 882.7475815078.

The spelling of 687875132 in words is "six hundred eighty-seven million, eight hundred seventy-five thousand, one hundred thirty-two".