71438071 has 2 divisors, whose sum is σ = 71438072. Its totient is φ = 71438070.

The previous prime is 71438051. The next prime is 71438149. The reversal of 71438071 is 17083417.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71438071 - 2¹⁵ = 71405303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71438021) 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, 35719035 + 35719036.

It is an arithmetic number, because the mean of its divisors is an integer number (35719036).

Almost surely, 2^71438071 is an apocalyptic number.

71438071 is a deficient number, since it is larger than the sum of its proper divisors (1).

71438071 is an equidigital number, since it uses as much as digits as its factorization.

71438071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 71438071 is about 8452.1045308254. The cubic root of 71438071 is about 414.9316595261.

The spelling of 71438071 in words is "seventy-one million, four hundred thirty-eight thousand, seventy-one".