71047771 has 2 divisors, whose sum is σ = 71047772. Its totient is φ = 71047770.

The previous prime is 71047727. The next prime is 71047831. The reversal of 71047771 is 17774017.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71047771 - 2⁷ = 71047643 is a prime.

It is not a weakly prime, because it can be changed into another prime (71047271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35523885 + 35523886.

It is an arithmetic number, because the mean of its divisors is an integer number (35523886).

Almost surely, 2^71047771 is an apocalyptic number.

71047771 is a deficient number, since it is larger than the sum of its proper divisors (1).

71047771 is an equidigital number, since it uses as much as digits as its factorization.

71047771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9604, while the sum is 34.

The square root of 71047771 is about 8428.9839838500. The cubic root of 71047771 is about 414.1746231380.

The spelling of 71047771 in words is "seventy-one million, forty-seven thousand, seven hundred seventy-one".