71047663 has 2 divisors, whose sum is σ = 71047664. Its totient is φ = 71047662.

The previous prime is 71047643. The next prime is 71047673. The reversal of 71047663 is 36674017.

It is a strong prime.

It is an emirp because it is prime and its reverse (36674017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71047663 - 2¹³ = 71039471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71047633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35523831 + 35523832.

It is an arithmetic number, because the mean of its divisors is an integer number (35523832).

Almost surely, 2^71047663 is an apocalyptic number.

71047663 is a deficient number, since it is larger than the sum of its proper divisors (1).

71047663 is an equidigital number, since it uses as much as digits as its factorization.

71047663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 71047663 is about 8428.9775773815. The cubic root of 71047663 is about 414.1744132750.

The spelling of 71047663 in words is "seventy-one million, forty-seven thousand, six hundred sixty-three".