1687947275 has 12 divisors (see below), whose sum is σ = 2392062672. Its totient is φ = 1157449440.

The previous prime is 1687947227. The next prime is 1687947307. The reversal of 1687947275 is 5727497861.

It is not a de Polignac number, because 1687947275 - 2¹⁰ = 1687946251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1687947275.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4822532 + ... + 4822881.

It is an arithmetic number, because the mean of its divisors is an integer number (199338556).

Almost surely, 2^1687947275 is an apocalyptic number.

1687947275 is a deficient number, since it is larger than the sum of its proper divisors (704115397).

1687947275 is an equidigital number, since it uses as much as digits as its factorization.

1687947275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9645430 (or 9645425 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 56.

The square root of 1687947275 is about 41084.6355101271. The cubic root of 1687947275 is about 1190.6559655814.

The spelling of 1687947275 in words is "one billion, six hundred eighty-seven million, nine hundred forty-seven thousand, two hundred seventy-five".