82191867 has 8 divisors (see below), whose sum is σ = 110315520. Its totient is φ = 54431400.

The previous prime is 82191859. The next prime is 82191869. The reversal of 82191867 is 76819128.

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

It is not a de Polignac number, because 82191867 - 2³ = 82191859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82191869) 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, 90267 + ... + 91172.

It is an arithmetic number, because the mean of its divisors is an integer number (13789440).

Almost surely, 2^82191867 is an apocalyptic number.

82191867 is a deficient number, since it is larger than the sum of its proper divisors (28123653).

82191867 is a wasteful number, since it uses less digits than its factorization.

82191867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181593.

The product of its digits is 48384, while the sum is 42.

The square root of 82191867 is about 9065.9730310651. The cubic root of 82191867 is about 434.7867312347.

The spelling of 82191867 in words is "eighty-two million, one hundred ninety-one thousand, eight hundred sixty-seven".