87180871 has 2 divisors, whose sum is σ = 87180872. Its totient is φ = 87180870.

The previous prime is 87180859. The next prime is 87180881. The reversal of 87180871 is 17808178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87180871 - 2²⁵ = 53626439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87180881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43590435 + 43590436.

It is an arithmetic number, because the mean of its divisors is an integer number (43590436).

Almost surely, 2^87180871 is an apocalyptic number.

87180871 is a deficient number, since it is larger than the sum of its proper divisors (1).

87180871 is an equidigital number, since it uses as much as digits as its factorization.

87180871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 40.

The square root of 87180871 is about 9337.0697223487. The cubic root of 87180871 is about 443.4116178236.

The spelling of 87180871 in words is "eighty-seven million, one hundred eighty thousand, eight hundred seventy-one".