82640911 has 4 divisors (see below), whose sum is σ = 82664632. Its totient is φ = 82617192.

The previous prime is 82640897. The next prime is 82640977. The reversal of 82640911 is 11904628.

It is a happy number.

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 82640911 - 2¹¹ = 82638863 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 (82647911) 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 3 ways as a sum of consecutive naturals, for example, 5496 + ... + 13981.

It is an arithmetic number, because the mean of its divisors is an integer number (20666158).

Almost surely, 2^82640911 is an apocalyptic number.

82640911 is a deficient number, since it is larger than the sum of its proper divisors (23721).

82640911 is a wasteful number, since it uses less digits than its factorization.

82640911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23720.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 82640911 is about 9090.7046481557. The cubic root of 82640911 is about 435.5770928711.

The spelling of 82640911 in words is "eighty-two million, six hundred forty thousand, nine hundred eleven".