687872105 has 32 divisors (see below), whose sum is σ = 929698560. Its totient is φ = 485498880.

The previous prime is 687872099. The next prime is 687872111. The reversal of 687872105 is 501278786.

It is an interprime number because it is at equal distance from previous prime (687872099) and next prime (687872111).

It is not a de Polignac number, because 687872105 - 2¹⁰ = 687871081 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154460 + ... + 158850.

It is an arithmetic number, because the mean of its divisors is an integer number (29053080).

Almost surely, 2^687872105 is an apocalyptic number.

It is an amenable number.

687872105 is a deficient number, since it is larger than the sum of its proper divisors (241826455).

687872105 is a wasteful number, since it uses less digits than its factorization.

687872105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529.

The product of its (nonzero) digits is 188160, while the sum is 44.

The square root of 687872105 is about 26227.3160083147. The cubic root of 687872105 is about 882.7462866600.

The spelling of 687872105 in words is "six hundred eighty-seven million, eight hundred seventy-two thousand, one hundred five".