82748561 has 4 divisors (see below), whose sum is σ = 94569792. Its totient is φ = 70927332.

The previous prime is 82748527. The next prime is 82748563. The reversal of 82748561 is 16584728.

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 not a de Polignac number, because 82748561 - 2²² = 78554257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82748563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5910605 + ... + 5910618.

It is an arithmetic number, because the mean of its divisors is an integer number (23642448).

Almost surely, 2^82748561 is an apocalyptic number.

It is an amenable number.

82748561 is a deficient number, since it is larger than the sum of its proper divisors (11821231).

82748561 is a wasteful number, since it uses less digits than its factorization.

82748561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11821230.

The product of its digits is 107520, while the sum is 41.

The square root of 82748561 is about 9096.6236043930. The cubic root of 82748561 is about 435.7661418068.

The spelling of 82748561 in words is "eighty-two million, seven hundred forty-eight thousand, five hundred sixty-one".