868049009 has 2 divisors, whose sum is σ = 868049010. Its totient is φ = 868049008.

The previous prime is 868048997. The next prime is 868049033. The reversal of 868049009 is 900940868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 607129600 + 260919409 = 24640^2 + 16153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868049009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (868049209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434024504 + 434024505.

It is an arithmetic number, because the mean of its divisors is an integer number (434024505).

Almost surely, 2^868049009 is an apocalyptic number.

It is an amenable number.

868049009 is a deficient number, since it is larger than the sum of its proper divisors (1).

868049009 is an equidigital number, since it uses as much as digits as its factorization.

868049009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 868049009 is about 29462.6714504982. The cubic root of 868049009 is about 953.9261373958.

The spelling of 868049009 in words is "eight hundred sixty-eight million, forty-nine thousand, nine".