867668489 has 2 divisors, whose sum is σ = 867668490. Its totient is φ = 867668488.

The previous prime is 867668479. The next prime is 867668509. The reversal of 867668489 is 984866768.

It is a happy number.

867668489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437520889 + 430147600 = 20917^2 + 20740^2 .

It is a cyclic number.

It is not a de Polignac number, because 867668489 - 2²⁰ = 866619913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (867668419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433834244 + 433834245.

It is an arithmetic number, because the mean of its divisors is an integer number (433834245).

Almost surely, 2^867668489 is an apocalyptic number.

It is an amenable number.

867668489 is a deficient number, since it is larger than the sum of its proper divisors (1).

867668489 is an equidigital number, since it uses as much as digits as its factorization.

867668489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27869184, while the sum is 62.

The square root of 867668489 is about 29456.2130797562. The cubic root of 867668489 is about 953.7867285901.

The spelling of 867668489 in words is "eight hundred sixty-seven million, six hundred sixty-eight thousand, four hundred eighty-nine".