867044387281 has 2 divisors, whose sum is σ = 867044387282. Its totient is φ = 867044387280.

The previous prime is 867044387257. The next prime is 867044387317. The reversal of 867044387281 is 182783440768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 858022427025 + 9021960256 = 926295^2 + 94984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-867044387281 is a prime.

It is a super-2 number, since 2×867044387281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (867044387981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433522193640 + 433522193641.

It is an arithmetic number, because the mean of its divisors is an integer number (433522193641).

Almost surely, 2^867044387281 is an apocalyptic number.

It is an amenable number.

867044387281 is a deficient number, since it is larger than the sum of its proper divisors (1).

867044387281 is an equidigital number, since it uses as much as digits as its factorization.

867044387281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14450688, while the sum is 58.

The spelling of 867044387281 in words is "eight hundred sixty-seven billion, forty-four million, three hundred eighty-seven thousand, two hundred eighty-one".