171968087 has 2 divisors, whose sum is σ = 171968088. Its totient is φ = 171968086.

The previous prime is 171968081. The next prime is 171968113. The reversal of 171968087 is 780869171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171968087 - 2¹⁰ = 171967063 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171968081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85984043 + 85984044.

It is an arithmetic number, because the mean of its divisors is an integer number (85984044).

Almost surely, 2^171968087 is an apocalyptic number.

171968087 is a deficient number, since it is larger than the sum of its proper divisors (1).

171968087 is an equidigital number, since it uses as much as digits as its factorization.

171968087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 47.

The square root of 171968087 is about 13113.6603204445. The cubic root of 171968087 is about 556.0953796224.

The spelling of 171968087 in words is "one hundred seventy-one million, nine hundred sixty-eight thousand, eighty-seven".