71438073 has 16 divisors (see below), whose sum is σ = 111175680. Its totient is φ = 39952656.

The previous prime is 71438071. The next prime is 71438149. The reversal of 71438073 is 37083417.

It is not a de Polignac number, because 71438073 - 2¹ = 71438071 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71438071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35203 + ... + 37176.

It is an arithmetic number, because the mean of its divisors is an integer number (6948480).

Almost surely, 2^71438073 is an apocalyptic number.

It is an amenable number.

71438073 is a deficient number, since it is larger than the sum of its proper divisors (39737607).

71438073 is a wasteful number, since it uses less digits than its factorization.

71438073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72436.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 71438073 is about 8452.1046491392. The cubic root of 71438073 is about 414.9316633983.

The spelling of 71438073 in words is "seventy-one million, four hundred thirty-eight thousand, seventy-three".