82427749 has 4 divisors (see below), whose sum is σ = 84655564. Its totient is φ = 80199936.

The previous prime is 82427743. The next prime is 82427759. The reversal of 82427749 is 94772428.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48205249 + 34222500 = 6943^2 + 5850^2 .

It is a cyclic number.

It is not a de Polignac number, because 82427749 - 2⁵ = 82427717 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 (82427743) 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, 1113852 + ... + 1113925.

It is an arithmetic number, because the mean of its divisors is an integer number (21163891).

Almost surely, 2^82427749 is an apocalyptic number.

It is an amenable number.

82427749 is a deficient number, since it is larger than the sum of its proper divisors (2227815).

82427749 is a wasteful number, since it uses less digits than its factorization.

82427749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227814.

The product of its digits is 225792, while the sum is 43.

The square root of 82427749 is about 9078.9729044645. The cubic root of 82427749 is about 435.2022646811.

The spelling of 82427749 in words is "eighty-two million, four hundred twenty-seven thousand, seven hundred forty-nine".