87715171 has 2 divisors, whose sum is σ = 87715172. Its totient is φ = 87715170.

The previous prime is 87715163. The next prime is 87715183. The reversal of 87715171 is 17151778.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87715171 - 2³ = 87715163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87715171.

It is not a weakly prime, because it can be changed into another prime (87710171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43857585 + 43857586.

It is an arithmetic number, because the mean of its divisors is an integer number (43857586).

Almost surely, 2^87715171 is an apocalyptic number.

87715171 is a deficient number, since it is larger than the sum of its proper divisors (1).

87715171 is an equidigital number, since it uses as much as digits as its factorization.

87715171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13720, while the sum is 37.

The square root of 87715171 is about 9365.6377786032. The cubic root of 87715171 is about 444.3156100162.

The spelling of 87715171 in words is "eighty-seven million, seven hundred fifteen thousand, one hundred seventy-one".