836821273 has 2 divisors, whose sum is σ = 836821274. Its totient is φ = 836821272.

The previous prime is 836821261. The next prime is 836821327. The reversal of 836821273 is 372128638.

Together with next prime (836821327) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 803609104 + 33212169 = 28348^2 + 5763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-836821273 is a prime.

It is not a weakly prime, because it can be changed into another prime (836821253) 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, 418410636 + 418410637.

It is an arithmetic number, because the mean of its divisors is an integer number (418410637).

Almost surely, 2^836821273 is an apocalyptic number.

It is an amenable number.

836821273 is a deficient number, since it is larger than the sum of its proper divisors (1).

836821273 is an equidigital number, since it uses as much as digits as its factorization.

836821273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 836821273 is about 28927.8632636425. The cubic root of 836821273 is about 942.3471121443.

The spelling of 836821273 in words is "eight hundred thirty-six million, eight hundred twenty-one thousand, two hundred seventy-three".