71980143 has 8 divisors (see below), whose sum is σ = 96023808. Its totient is φ = 47961624.

The previous prime is 71980127. The next prime is 71980147. The reversal of 71980143 is 34108917.

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

It is not a de Polignac number, because 71980143 - 2⁴ = 71980127 is a prime.

It is a super-2 number, since 2×71980143² = 10362281972600898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71980147) 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, 1930 + ... + 12152.

It is an arithmetic number, because the mean of its divisors is an integer number (12002976).

Almost surely, 2^71980143 is an apocalyptic number.

71980143 is a deficient number, since it is larger than the sum of its proper divisors (24043665).

71980143 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (71980142) it forms an eRAP, since the sums of their prime factors are consecutive (12572 and 12573).

71980143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12573.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 71980143 is about 8484.1112086064. Note that the first 3 decimals coincide. The cubic root of 71980143 is about 415.9785164417.

The spelling of 71980143 in words is "seventy-one million, nine hundred eighty thousand, one hundred forty-three".