687070100 has 18 divisors (see below), whose sum is σ = 1490942334. Its totient is φ = 274828000.

The previous prime is 687070091. The next prime is 687070123. The reversal of 687070100 is 1070786.

It can be written as a sum of positive squares in 3 ways, for example, as 1156 + 687068944 = 34^2 + 26212^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3435251 + ... + 3435450.

Almost surely, 2^687070100 is an apocalyptic number.

It is an amenable number.

687070100 is an abundant number, since it is smaller than the sum of its proper divisors (803872234).

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

687070100 is a wasteful number, since it uses less digits than its factorization.

687070100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6870715 (or 6870708 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 687070100 is about 26212.0220509597. The cubic root of 687070100 is about 882.4030822312.

The spelling of 687070100 in words is "six hundred eighty-seven million, seventy thousand, one hundred".