82738681 has 2 divisors, whose sum is σ = 82738682. Its totient is φ = 82738680.

The previous prime is 82738679. The next prime is 82738703. The reversal of 82738681 is 18683728.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81090025 + 1648656 = 9005^2 + 1284^2 .

It is a cyclic number.

It is not a de Polignac number, because 82738681 - 2¹ = 82738679 is a prime.

It is a super-2 number, since 2×82738681² = 13691378667239522, which contains 22 as substring.

Together with 82738679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (82738651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41369340 + 41369341.

It is an arithmetic number, because the mean of its divisors is an integer number (41369341).

Almost surely, 2^82738681 is an apocalyptic number.

It is an amenable number.

82738681 is a deficient number, since it is larger than the sum of its proper divisors (1).

82738681 is an equidigital number, since it uses as much as digits as its factorization.

82738681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 82738681 is about 9096.0805295468. The cubic root of 82738681 is about 435.7487979369.

The spelling of 82738681 in words is "eighty-two million, seven hundred thirty-eight thousand, six hundred eighty-one".