865273481 has 2 divisors, whose sum is σ = 865273482. Its totient is φ = 865273480.

The previous prime is 865273469. The next prime is 865273499. The reversal of 865273481 is 184372568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 709423225 + 155850256 = 26635^2 + 12484^2 .

It is a cyclic number.

It is not a de Polignac number, because 865273481 - 2¹⁴ = 865257097 is a prime.

It is a super-2 number, since 2×865273481² = 1497396393843714722, 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 (865273421) 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, 432636740 + 432636741.

It is an arithmetic number, because the mean of its divisors is an integer number (432636741).

Almost surely, 2^865273481 is an apocalyptic number.

It is an amenable number.

865273481 is a deficient number, since it is larger than the sum of its proper divisors (1).

865273481 is an equidigital number, since it uses as much as digits as its factorization.

865273481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 44.

The square root of 865273481 is about 29415.5312887597. The cubic root of 865273481 is about 952.9083470818.

The spelling of 865273481 in words is "eight hundred sixty-five million, two hundred seventy-three thousand, four hundred eighty-one".