82871887 has 16 divisors (see below), whose sum is σ = 97081600. Its totient is φ = 70711704.

The previous prime is 82871881. The next prime is 82871909. The reversal of 82871887 is 78817828.

It is a de Polignac number, because none of the positive numbers 2^k-82871887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 82871887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82871881) 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 15 ways as a sum of consecutive naturals, for example, 104908 + ... + 105694.

It is an arithmetic number, because the mean of its divisors is an integer number (6067600).

Almost surely, 2^82871887 is an apocalyptic number.

82871887 is a deficient number, since it is larger than the sum of its proper divisors (14209713).

82871887 is an equidigital number, since it uses as much as digits as its factorization.

82871887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115 (or 1101 counting only the distinct ones).

The product of its digits is 401408, while the sum is 49.

The square root of 82871887 is about 9103.3997495441. The cubic root of 82871887 is about 435.9825186577.

The spelling of 82871887 in words is "eighty-two million, eight hundred seventy-one thousand, eight hundred eighty-seven".