71084161 has 2 divisors, whose sum is σ = 71084162. Its totient is φ = 71084160.

The previous prime is 71084159. The next prime is 71084171. The reversal of 71084161 is 16148017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36978561 + 34105600 = 6081^2 + 5840^2 .

It is a cyclic number.

It is not a de Polignac number, because 71084161 - 2¹ = 71084159 is a prime.

Together with 71084159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71084171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35542080 + 35542081.

It is an arithmetic number, because the mean of its divisors is an integer number (35542081).

Almost surely, 2^71084161 is an apocalyptic number.

It is an amenable number.

71084161 is a deficient number, since it is larger than the sum of its proper divisors (1).

71084161 is an equidigital number, since it uses as much as digits as its factorization.

71084161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 71084161 is about 8431.1423306691. The cubic root of 71084161 is about 414.2453231841.

The spelling of 71084161 in words is "seventy-one million, eighty-four thousand, one hundred sixty-one".