687520136 has 32 divisors (see below), whose sum is σ = 1318896000. Its totient is φ = 335841216.

The previous prime is 687520133. The next prime is 687520181. The reversal of 687520136 is 631025786.

687520136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 687520136.

It is not an unprimeable number, because it can be changed into a prime (687520133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265295 + ... + 267873.

It is an arithmetic number, because the mean of its divisors is an integer number (41215500).

Almost surely, 2^687520136 is an apocalyptic number.

It is an amenable number.

687520136 is a deficient number, since it is larger than the sum of its proper divisors (631375864).

687520136 is a wasteful number, since it uses less digits than its factorization.

687520136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341 (or 3337 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 687520136 is about 26220.6051798962. The cubic root of 687520136 is about 882.5957003649.

The spelling of 687520136 in words is "six hundred eighty-seven million, five hundred twenty thousand, one hundred thirty-six".