87168717 has 28 divisors (see below), whose sum is σ = 132012540. Its totient is φ = 57526848.

The previous prime is 87168709. The next prime is 87168721. The reversal of 87168717 is 71786178.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42693156 + 44475561 = 6534^2 + 6669^2 .

It is not a de Polignac number, because 87168717 - 2³ = 87168709 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87168737) by changing a digit.

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 27 ways as a sum of consecutive naturals, for example, 78913 + ... + 80009.

Almost surely, 2^87168717 is an apocalyptic number.

It is an amenable number.

87168717 is a deficient number, since it is larger than the sum of its proper divisors (44843823).

87168717 is a wasteful number, since it uses less digits than its factorization.

87168717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 1209 counting only the distinct ones).

The product of its digits is 131712, while the sum is 45.

The square root of 87168717 is about 9336.4188530721. The cubic root of 87168717 is about 443.3910113335.

The spelling of 87168717 in words is "eighty-seven million, one hundred sixty-eight thousand, seven hundred seventeen".