71385005 has 4 divisors (see below), whose sum is σ = 85662012. Its totient is φ = 57108000.

The previous prime is 71384987. The next prime is 71385019. The reversal of 71385005 is 50058317.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17023876 + 54361129 = 4126^2 + 7373^2 .

It is not a de Polignac number, because 71385005 - 2⁶ = 71384941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7138496 + ... + 7138505.

It is an arithmetic number, because the mean of its divisors is an integer number (21415503).

Almost surely, 2^71385005 is an apocalyptic number.

It is an amenable number.

71385005 is a deficient number, since it is larger than the sum of its proper divisors (14277007).

71385005 is a wasteful number, since it uses less digits than its factorization.

71385005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14277006.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 71385005 is about 8448.9647294802. The cubic root of 71385005 is about 414.8288935106.

The spelling of 71385005 in words is "seventy-one million, three hundred eighty-five thousand, five".