71000191 has 2 divisors, whose sum is σ = 71000192. Its totient is φ = 71000190.

The previous prime is 71000159. The next prime is 71000201. The reversal of 71000191 is 19100017.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71000191 - 2⁵ = 71000159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71000141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35500095 + 35500096.

It is an arithmetic number, because the mean of its divisors is an integer number (35500096).

Almost surely, 2^71000191 is an apocalyptic number.

71000191 is a deficient number, since it is larger than the sum of its proper divisors (1).

71000191 is an equidigital number, since it uses as much as digits as its factorization.

71000191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63, while the sum is 19.

The square root of 71000191 is about 8426.1611069336. The cubic root of 71000191 is about 414.0821462547.

The spelling of 71000191 in words is "seventy-one million, one hundred ninety-one", and thus it is an aban number.