71005573 has 4 divisors (see below), whose sum is σ = 71564800. Its totient is φ = 70446348.

The previous prime is 71005559. The next prime is 71005591. The reversal of 71005573 is 37550017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37550017 = 569 ⋅65993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71005573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71015573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279423 + ... + 279676.

It is an arithmetic number, because the mean of its divisors is an integer number (17891200).

Almost surely, 2^71005573 is an apocalyptic number.

It is an amenable number.

71005573 is a deficient number, since it is larger than the sum of its proper divisors (559227).

71005573 is a wasteful number, since it uses less digits than its factorization.

71005573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559226.

The product of its (nonzero) digits is 3675, while the sum is 28.

The square root of 71005573 is about 8426.4804633963. The cubic root of 71005573 is about 414.0926088266.

The spelling of 71005573 in words is "seventy-one million, five thousand, five hundred seventy-three".