82109711 has 4 divisors (see below), whose sum is σ = 86939712. Its totient is φ = 77279712.

The previous prime is 82109707. The next prime is 82109737. The reversal of 82109711 is 11790128.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82109711 - 2² = 82109707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82109791) 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, 2414975 + ... + 2415008.

It is an arithmetic number, because the mean of its divisors is an integer number (21734928).

Almost surely, 2^82109711 is an apocalyptic number.

82109711 is a deficient number, since it is larger than the sum of its proper divisors (4830001).

82109711 is a wasteful number, since it uses less digits than its factorization.

82109711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830000.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 82109711 is about 9061.4408898365. The cubic root of 82109711 is about 434.6418172742.

Adding to 82109711 its reverse (11790128), we get a palindrome (93899839).

The spelling of 82109711 in words is "eighty-two million, one hundred nine thousand, seven hundred eleven".