171164887 has 2 divisors, whose sum is σ = 171164888. Its totient is φ = 171164886.

The previous prime is 171164879. The next prime is 171164899. The reversal of 171164887 is 788461171.

It is a weak prime.

It is an emirp because it is prime and its reverse (788461171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171164887 - 2³ = 171164879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171164837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85582443 + 85582444.

It is an arithmetic number, because the mean of its divisors is an integer number (85582444).

Almost surely, 2^171164887 is an apocalyptic number.

171164887 is a deficient number, since it is larger than the sum of its proper divisors (1).

171164887 is an equidigital number, since it uses as much as digits as its factorization.

171164887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 43.

The square root of 171164887 is about 13082.9999235649. Note that the first 4 decimals coincide. The cubic root of 171164887 is about 555.2282555427.

The spelling of 171164887 in words is "one hundred seventy-one million, one hundred sixty-four thousand, eight hundred eighty-seven".