71943005 has 8 divisors (see below), whose sum is σ = 86400600. Its totient is φ = 57508416.

The previous prime is 71942993. The next prime is 71943013. The reversal of 71943005 is 50034917.

It can be written as a sum of positive squares in 4 ways, for example, as 337561 + 71605444 = 581^2 + 8462^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71943005 - 2²⁰ = 70894429 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2111 + ... + 12179.

It is an arithmetic number, because the mean of its divisors is an integer number (10800075).

Almost surely, 2^71943005 is an apocalyptic number.

It is an amenable number.

71943005 is a deficient number, since it is larger than the sum of its proper divisors (14457595).

71943005 is a wasteful number, since it uses less digits than its factorization.

71943005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11503.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 71943005 is about 8481.9222467552. The cubic root of 71943005 is about 415.9069630607.

The spelling of 71943005 in words is "seventy-one million, nine hundred forty-three thousand, five".