82656491 has 4 divisors (see below), whose sum is σ = 82796472. Its totient is φ = 82516512.

The previous prime is 82656487. The next prime is 82656527. The reversal of 82656491 is 19465628.

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 82656491 - 2² = 82656487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82656401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69101 + ... + 70286.

It is an arithmetic number, because the mean of its divisors is an integer number (20699118).

Almost surely, 2^82656491 is an apocalyptic number.

82656491 is a deficient number, since it is larger than the sum of its proper divisors (139981).

82656491 is a wasteful number, since it uses less digits than its factorization.

82656491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139980.

The product of its digits is 103680, while the sum is 41.

The square root of 82656491 is about 9091.5615270425. The cubic root of 82656491 is about 435.6044637564.

The spelling of 82656491 in words is "eighty-two million, six hundred fifty-six thousand, four hundred ninety-one".