87938171 has 2 divisors, whose sum is σ = 87938172. Its totient is φ = 87938170.

The previous prime is 87938129. The next prime is 87938189. The reversal of 87938171 is 17183978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87938171 - 2¹⁰ = 87937147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87938471) 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, 43969085 + 43969086.

It is an arithmetic number, because the mean of its divisors is an integer number (43969086).

Almost surely, 2^87938171 is an apocalyptic number.

87938171 is a deficient number, since it is larger than the sum of its proper divisors (1).

87938171 is an equidigital number, since it uses as much as digits as its factorization.

87938171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 44.

The square root of 87938171 is about 9377.5354438146. The cubic root of 87938171 is about 444.6918221429.

The spelling of 87938171 in words is "eighty-seven million, nine hundred thirty-eight thousand, one hundred seventy-one".