171270487 has 2 divisors, whose sum is σ = 171270488. Its totient is φ = 171270486.

The previous prime is 171270439. The next prime is 171270497. The reversal of 171270487 is 784072171.

171270487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (784072171) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171270487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171270497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85635243 + 85635244.

It is an arithmetic number, because the mean of its divisors is an integer number (85635244).

Almost surely, 2^171270487 is an apocalyptic number.

171270487 is a deficient number, since it is larger than the sum of its proper divisors (1).

171270487 is an equidigital number, since it uses as much as digits as its factorization.

171270487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21952, while the sum is 37.

The square root of 171270487 is about 13087.0350729262. The cubic root of 171270487 is about 555.3424145685.

The spelling of 171270487 in words is "one hundred seventy-one million, two hundred seventy thousand, four hundred eighty-seven".