687133706 has 16 divisors (see below), whose sum is σ = 1197910080. Its totient is φ = 289494240.

The previous prime is 687133687. The next prime is 687133723. The reversal of 687133706 is 607331786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415115 + ... + 416766.

It is an arithmetic number, because the mean of its divisors is an integer number (74869380).

Almost surely, 2^687133706 is an apocalyptic number.

687133706 is a deficient number, since it is larger than the sum of its proper divisors (510776374).

687133706 is a wasteful number, since it uses less digits than its factorization.

687133706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831949.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 687133706 is about 26213.2353211121. The cubic root of 687133706 is about 882.4303110873.

The spelling of 687133706 in words is "six hundred eighty-seven million, one hundred thirty-three thousand, seven hundred six".