71971413 has 8 divisors (see below), whose sum is σ = 96049728. Its totient is φ = 47937024.

The previous prime is 71971409. The next prime is 71971423. The reversal of 71971413 is 31417917.

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

It is not a de Polignac number, because 71971413 - 2² = 71971409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71971423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6945 + ... + 13862.

It is an arithmetic number, because the mean of its divisors is an integer number (12006216).

Almost surely, 2^71971413 is an apocalyptic number.

It is an amenable number.

71971413 is a deficient number, since it is larger than the sum of its proper divisors (24078315).

71971413 is a wasteful number, since it uses less digits than its factorization.

71971413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21963.

The product of its digits is 5292, while the sum is 33.

The square root of 71971413 is about 8483.5967018712. The cubic root of 71971413 is about 415.9616986587.

The spelling of 71971413 in words is "seventy-one million, nine hundred seventy-one thousand, four hundred thirteen".