172587871 has 2 divisors, whose sum is σ = 172587872. Its totient is φ = 172587870.

The previous prime is 172587847. The next prime is 172587889. The reversal of 172587871 is 178785271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172587871 - 2⁵ = 172587839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172584871) 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, 86293935 + 86293936.

It is an arithmetic number, because the mean of its divisors is an integer number (86293936).

Almost surely, 2^172587871 is an apocalyptic number.

172587871 is a deficient number, since it is larger than the sum of its proper divisors (1).

172587871 is an equidigital number, since it uses as much as digits as its factorization.

172587871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 219520, while the sum is 46.

The square root of 172587871 is about 13137.2703024639. The cubic root of 172587871 is about 556.7626464278.

The spelling of 172587871 in words is "one hundred seventy-two million, five hundred eighty-seven thousand, eight hundred seventy-one".