82118671 has 8 divisors (see below), whose sum is σ = 86897664. Its totient is φ = 77440440.

The previous prime is 82118669. The next prime is 82118689. The reversal of 82118671 is 17681128.

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

It is a cyclic number.

It is not a de Polignac number, because 82118671 - 2¹ = 82118669 is a prime.

It is a super-2 number, since 2×82118671² = 13486952253612482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82118371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23511 + ... + 26776.

It is an arithmetic number, because the mean of its divisors is an integer number (10862208).

Almost surely, 2^82118671 is an apocalyptic number.

82118671 is a deficient number, since it is larger than the sum of its proper divisors (4778993).

82118671 is a wasteful number, since it uses less digits than its factorization.

82118671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50381.

The product of its digits is 5376, while the sum is 34.

The square root of 82118671 is about 9061.9352789567. The cubic root of 82118671 is about 434.6576264032.

Adding to 82118671 its reverse (17681128), we get a palindrome (99799799).

The spelling of 82118671 in words is "eighty-two million, one hundred eighteen thousand, six hundred seventy-one".