71683971 has 8 divisors (see below), whose sum is σ = 95620800. Its totient is φ = 47768232.

The previous prime is 71683957. The next prime is 71683991. The reversal of 71683971 is 17938617.

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

It is not a de Polignac number, because 71683971 - 2⁹ = 71683459 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (71683921) 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 in 7 ways as a sum of consecutive naturals, for example, 6276 + ... + 13518.

It is an arithmetic number, because the mean of its divisors is an integer number (11952600).

Almost surely, 2^71683971 is an apocalyptic number.

71683971 is a deficient number, since it is larger than the sum of its proper divisors (23936829).

71683971 is a wasteful number, since it uses less digits than its factorization.

71683971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10545.

The product of its digits is 63504, while the sum is 42.

The square root of 71683971 is about 8466.6387073029. The cubic root of 71683971 is about 415.4071989120.

The spelling of 71683971 in words is "seventy-one million, six hundred eighty-three thousand, nine hundred seventy-one".