87517172 has 12 divisors (see below), whose sum is σ = 153591396. Its totient is φ = 43633920.

The previous prime is 87517163. The next prime is 87517181. The reversal of 87517172 is 27171578.

It is an interprime number because it is at equal distance from previous prime (87517163) and next prime (87517181).

It can be written as a sum of positive squares in 2 ways, for example, as 43507216 + 44009956 = 6596^2 + 6634^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 29579 + ... + 32402.

It is an arithmetic number, because the mean of its divisors is an integer number (12799283).

Almost surely, 2^87517172 is an apocalyptic number.

It is an amenable number.

87517172 is a deficient number, since it is larger than the sum of its proper divisors (66074224).

87517172 is a wasteful number, since it uses less digits than its factorization.

87517172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62338 (or 62336 counting only the distinct ones).

The product of its digits is 27440, while the sum is 38.

The square root of 87517172 is about 9355.0613039146. The cubic root of 87517172 is about 443.9810410431.

The spelling of 87517172 in words is "eighty-seven million, five hundred seventeen thousand, one hundred seventy-two".