82782481 has 4 divisors (see below), whose sum is σ = 82801152. Its totient is φ = 82763812.

The previous prime is 82782473. The next prime is 82782499. The reversal of 82782481 is 18428728.

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 82782481 - 2³ = 82782473 is a prime.

It is a super-2 number, since 2×82782481² = 13705878321030722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82782421) 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, 1536 + ... + 12958.

It is an arithmetic number, because the mean of its divisors is an integer number (20700288).

Almost surely, 2^82782481 is an apocalyptic number.

It is an amenable number.

82782481 is a deficient number, since it is larger than the sum of its proper divisors (18671).

82782481 is a wasteful number, since it uses less digits than its factorization.

82782481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18670.

The product of its digits is 57344, while the sum is 40.

The square root of 82782481 is about 9098.4878413943. The cubic root of 82782481 is about 435.8256762492.

The spelling of 82782481 in words is "eighty-two million, seven hundred eighty-two thousand, four hundred eighty-one".