82971641 has 8 divisors (see below), whose sum is σ = 84520800. Its totient is φ = 81427360.

The previous prime is 82971619. The next prime is 82971643. The reversal of 82971641 is 14617928.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82971641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82971595 and 82971604.

It is not an unprimeable number, because it can be changed into a prime (82971643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63725 + ... + 65013.

It is an arithmetic number, because the mean of its divisors is an integer number (10565100).

Almost surely, 2^82971641 is an apocalyptic number.

It is an amenable number.

82971641 is a deficient number, since it is larger than the sum of its proper divisors (1549159).

82971641 is a wasteful number, since it uses less digits than its factorization.

82971641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439.

The product of its digits is 24192, while the sum is 38.

The square root of 82971641 is about 9108.8770438512. The cubic root of 82971641 is about 436.1573811801.

The spelling of 82971641 in words is "eighty-two million, nine hundred seventy-one thousand, six hundred forty-one".