87682171 has 2 divisors, whose sum is σ = 87682172. Its totient is φ = 87682170.

The previous prime is 87682159. The next prime is 87682211. The reversal of 87682171 is 17128678.

It is an a-pointer prime, because the next prime (87682211) can be obtained adding 87682171 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87682171 - 2¹⁵ = 87649403 is a prime.

It is a super-2 number, since 2×87682171² = 15376326222546482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87682121) by changing a digit.

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 as a sum of consecutive naturals, namely, 43841085 + 43841086.

It is an arithmetic number, because the mean of its divisors is an integer number (43841086).

Almost surely, 2^87682171 is an apocalyptic number.

87682171 is a deficient number, since it is larger than the sum of its proper divisors (1).

87682171 is an equidigital number, since it uses as much as digits as its factorization.

87682171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 40.

The square root of 87682171 is about 9363.8758535128. The cubic root of 87682171 is about 444.2598832280.

The spelling of 87682171 in words is "eighty-seven million, six hundred eighty-two thousand, one hundred seventy-one".