193871 has 2 divisors, whose sum is σ = 193872. Its totient is φ = 193870.

The previous prime is 193861. The next prime is 193873. The reversal of 193871 is 178391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 193871 - 2¹⁰ = 192847 is a prime.

It is a Sophie Germain prime.

Together with 193873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96935 + 96936.

It is an arithmetic number, because the mean of its divisors is an integer number (96936).

2¹⁹³⁸⁷¹ is an apocalyptic number.

193871 is a deficient number, since it is larger than the sum of its proper divisors (1).

193871 is an equidigital number, since it uses as much as digits as its factorization.

193871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 29.

The square root of 193871 is about 440.3078468526. The cubic root of 193871 is about 57.8767696747.

The spelling of 193871 in words is "one hundred ninety-three thousand, eight hundred seventy-one".