82871641 has 4 divisors (see below), whose sum is σ = 82933632. Its totient is φ = 82809652.

The previous prime is 82871639. The next prime is 82871681. The reversal of 82871641 is 14617828.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82871641 - 2¹ = 82871639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82871641.

It is not an unprimeable number, because it can be changed into a prime (82871681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28945 + ... + 31678.

It is an arithmetic number, because the mean of its divisors is an integer number (20733408).

Almost surely, 2^82871641 is an apocalyptic number.

It is an amenable number.

82871641 is a deficient number, since it is larger than the sum of its proper divisors (61991).

82871641 is a wasteful number, since it uses less digits than its factorization.

82871641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61990.

The product of its digits is 21504, while the sum is 37.

The square root of 82871641 is about 9103.3862380984. The cubic root of 82871641 is about 435.9820872617.

The spelling of 82871641 in words is "eighty-two million, eight hundred seventy-one thousand, six hundred forty-one".