71972943 has 16 divisors (see below), whose sum is σ = 109871616. Its totient is φ = 41052960.

The previous prime is 71972909. The next prime is 71972959. The reversal of 71972943 is 34927917.

It is not a de Polignac number, because 71972943 - 2¹⁴ = 71956559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71972895 and 71972904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71972143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10078 + ... + 15668.

It is an arithmetic number, because the mean of its divisors is an integer number (6866976).

Almost surely, 2^71972943 is an apocalyptic number.

71972943 is a deficient number, since it is larger than the sum of its proper divisors (37898673).

71972943 is a wasteful number, since it uses less digits than its factorization.

71972943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6214.

The product of its digits is 95256, while the sum is 42.

The square root of 71972943 is about 8483.6868754098. The cubic root of 71972943 is about 415.9646462035.

The spelling of 71972943 in words is "seventy-one million, nine hundred seventy-two thousand, nine hundred forty-three".