87425647171 has 2 divisors, whose sum is σ = 87425647172. Its totient is φ = 87425647170.

The previous prime is 87425647151. The next prime is 87425647187. The reversal of 87425647171 is 17174652478.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87425647171 - 2¹⁷ = 87425516099 is a prime.

It is not a weakly prime, because it can be changed into another prime (87425647121) 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, 43712823585 + 43712823586.

It is an arithmetic number, because the mean of its divisors is an integer number (43712823586).

Almost surely, 2^87425647171 is an apocalyptic number.

87425647171 is a deficient number, since it is larger than the sum of its proper divisors (1).

87425647171 is an equidigital number, since it uses as much as digits as its factorization.

87425647171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2634240, while the sum is 52.

The spelling of 87425647171 in words is "eighty-seven billion, four hundred twenty-five million, six hundred forty-seven thousand, one hundred seventy-one".