82971243 has 12 divisors (see below), whose sum is σ = 122990520. Its totient is φ = 55282608.

The previous prime is 82971223. The next prime is 82971269. The reversal of 82971243 is 34217928.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 82971243 - 2⁵ = 82971211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82971198 and 82971207.

It is not an unprimeable number, because it can be changed into a prime (82971223) 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 11 ways as a sum of consecutive naturals, for example, 46455 + ... + 48207.

It is an arithmetic number, because the mean of its divisors is an integer number (10249210).

Almost surely, 2^82971243 is an apocalyptic number.

82971243 is a deficient number, since it is larger than the sum of its proper divisors (40019277).

82971243 is an frugal number, since it uses more digits than its factorization.

82971243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515 (or 1756 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 82971243 is about 9108.8551970047. The cubic root of 82971243 is about 436.1566837896.

The spelling of 82971243 in words is "eighty-two million, nine hundred seventy-one thousand, two hundred forty-three".