82134881 has 2 divisors, whose sum is σ = 82134882. Its totient is φ = 82134880.

The previous prime is 82134869. The next prime is 82134883. The reversal of 82134881 is 18843128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79299025 + 2835856 = 8905^2 + 1684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82134881 is a prime.

It is a super-2 number, since 2×82134881² = 13492277353768322, which contains 22 as substring.

Together with 82134883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82134883) 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 as a sum of consecutive naturals, namely, 41067440 + 41067441.

It is an arithmetic number, because the mean of its divisors is an integer number (41067441).

Almost surely, 2^82134881 is an apocalyptic number.

It is an amenable number.

82134881 is a deficient number, since it is larger than the sum of its proper divisors (1).

82134881 is an equidigital number, since it uses as much as digits as its factorization.

82134881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 35.

The square root of 82134881 is about 9062.8296353843. The cubic root of 82134881 is about 434.6862245953.

The spelling of 82134881 in words is "eighty-two million, one hundred thirty-four thousand, eight hundred eighty-one".