8867861 has 2 divisors, whose sum is σ = 8867862. Its totient is φ = 8867860.

The previous prime is 8867843. The next prime is 8867869. The reversal of 8867861 is 1687688.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8814961 + 52900 = 2969^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 8867861 - 2⁶ = 8867797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8867869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4433930 + 4433931.

It is an arithmetic number, because the mean of its divisors is an integer number (4433931).

Almost surely, 2^8867861 is an apocalyptic number.

It is an amenable number.

8867861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8867861 is an equidigital number, since it uses as much as digits as its factorization.

8867861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 44.

The square root of 8867861 is about 2977.8953977600. The cubic root of 8867861 is about 206.9853584049.

The spelling of 8867861 in words is "eight million, eight hundred sixty-seven thousand, eight hundred sixty-one".