82118641 has 4 divisors (see below), whose sum is σ = 89583984. Its totient is φ = 74653300.

The previous prime is 82118639. The next prime is 82118669. The reversal of 82118641 is 14681128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82118641 - 2¹ = 82118639 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82110641) 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, 3732655 + ... + 3732676.

It is an arithmetic number, because the mean of its divisors is an integer number (22395996).

Almost surely, 2^82118641 is an apocalyptic number.

It is an amenable number.

82118641 is a deficient number, since it is larger than the sum of its proper divisors (7465343).

82118641 is a wasteful number, since it uses less digits than its factorization.

82118641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7465342.

The product of its digits is 3072, while the sum is 31.

The square root of 82118641 is about 9061.9336236810. The cubic root of 82118641 is about 434.6575734728.

Adding to 82118641 its reverse (14681128), we get a palindrome (96799769).

The spelling of 82118641 in words is "eighty-two million, one hundred eighteen thousand, six hundred forty-one".