71339647 has 2 divisors, whose sum is σ = 71339648. Its totient is φ = 71339646.

The previous prime is 71339627. The next prime is 71339651. The reversal of 71339647 is 74693317.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71339647 - 2¹¹ = 71337599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71339617) 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, 35669823 + 35669824.

It is an arithmetic number, because the mean of its divisors is an integer number (35669824).

Almost surely, 2^71339647 is an apocalyptic number.

71339647 is a deficient number, since it is larger than the sum of its proper divisors (1).

71339647 is an equidigital number, since it uses as much as digits as its factorization.

71339647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 40.

The square root of 71339647 is about 8446.2800687640. The cubic root of 71339647 is about 414.7410141979.

The spelling of 71339647 in words is "seventy-one million, three hundred thirty-nine thousand, six hundred forty-seven".