82856129 has 2 divisors, whose sum is σ = 82856130. Its totient is φ = 82856128.

The previous prime is 82856083. The next prime is 82856171. The reversal of 82856129 is 92165828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81360400 + 1495729 = 9020^2 + 1223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82856129 is a prime.

It is a super-2 number, since 2×82856129² = 13730276225729282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (82856429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41428064 + 41428065.

It is an arithmetic number, because the mean of its divisors is an integer number (41428065).

Almost surely, 2^82856129 is an apocalyptic number.

It is an amenable number.

82856129 is a deficient number, since it is larger than the sum of its proper divisors (1).

82856129 is an equidigital number, since it uses as much as digits as its factorization.

82856129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 82856129 is about 9102.5342075710. The cubic root of 82856129 is about 435.9548830374.

The spelling of 82856129 in words is "eighty-two million, eight hundred fifty-six thousand, one hundred twenty-nine".