87140171 has 2 divisors, whose sum is σ = 87140172. Its totient is φ = 87140170.

The previous prime is 87140153. The next prime is 87140177. The reversal of 87140171 is 17104178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87140171 - 2²² = 82945867 is a prime.

It is a Chen prime.

It is equal to p_5060837 and since 87140171 and 5060837 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (87140177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43570085 + 43570086.

It is an arithmetic number, because the mean of its divisors is an integer number (43570086).

Almost surely, 2^87140171 is an apocalyptic number.

87140171 is a deficient number, since it is larger than the sum of its proper divisors (1).

87140171 is an equidigital number, since it uses as much as digits as its factorization.

87140171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 87140171 is about 9334.8899832831. The cubic root of 87140171 is about 443.3426055058.

The spelling of 87140171 in words is "eighty-seven million, one hundred forty thousand, one hundred seventy-one".