687716500 has 24 divisors (see below), whose sum is σ = 1501973928. Its totient is φ = 275086400.

The previous prime is 687716489. The next prime is 687716507. The reversal of 687716500 is 5617786.

It can be written as a sum of positive squares in 4 ways, for example, as 14002564 + 673713936 = 3742^2 + 25956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687716507) 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, 687217 + ... + 688216.

It is an arithmetic number, because the mean of its divisors is an integer number (62582247).

Almost surely, 2^687716500 is an apocalyptic number.

It is an amenable number.

687716500 is an abundant number, since it is smaller than the sum of its proper divisors (814257428).

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

687716500 is a wasteful number, since it uses less digits than its factorization.

687716500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375452 (or 1375440 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 687716500 is about 26224.3493722914. The cubic root of 687716500 is about 882.6797190070.

The spelling of 687716500 in words is "six hundred eighty-seven million, seven hundred sixteen thousand, five hundred".