867266861 has 2 divisors, whose sum is σ = 867266862. Its totient is φ = 867266860.

The previous prime is 867266843. The next prime is 867266921. The reversal of 867266861 is 168662768.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 744744100 + 122522761 = 27290^2 + 11069^2 .

It is a cyclic number.

It is not a de Polignac number, because 867266861 - 2⁶ = 867266797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (867266461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433633430 + 433633431.

It is an arithmetic number, because the mean of its divisors is an integer number (433633431).

Almost surely, 2^867266861 is an apocalyptic number.

It is an amenable number.

867266861 is a deficient number, since it is larger than the sum of its proper divisors (1).

867266861 is an equidigital number, since it uses as much as digits as its factorization.

867266861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The square root of 867266861 is about 29449.3949173833. The cubic root of 867266861 is about 953.6395423543.

The spelling of 867266861 in words is "eight hundred sixty-seven million, two hundred sixty-six thousand, eight hundred sixty-one".