867641273 has 2 divisors, whose sum is σ = 867641274. Its totient is φ = 867641272.

The previous prime is 867641219. The next prime is 867641287. The reversal of 867641273 is 372146768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 459116329 + 408524944 = 21427^2 + 20212^2 .

It is a cyclic number.

It is not a de Polignac number, because 867641273 - 2⁶ = 867641209 is a prime.

It is a super-2 number, since 2×867641273² = 1505602757226121058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (867641293) 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, 433820636 + 433820637.

It is an arithmetic number, because the mean of its divisors is an integer number (433820637).

Almost surely, 2^867641273 is an apocalyptic number.

It is an amenable number.

867641273 is a deficient number, since it is larger than the sum of its proper divisors (1).

867641273 is an equidigital number, since it uses as much as digits as its factorization.

867641273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 44.

The square root of 867641273 is about 29455.7511022890. The cubic root of 867641273 is about 953.7767560674.

The spelling of 867641273 in words is "eight hundred sixty-seven million, six hundred forty-one thousand, two hundred seventy-three".