8871389 has 2 divisors, whose sum is σ = 8871390. Its totient is φ = 8871388.

The previous prime is 8871371. The next prime is 8871409. The reversal of 8871389 is 9831788.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6175225 + 2696164 = 2485^2 + 1642^2 .

It is a cyclic number.

It is not a de Polignac number, because 8871389 - 2¹² = 8867293 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 (8871349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4435694 + 4435695.

It is an arithmetic number, because the mean of its divisors is an integer number (4435695).

Almost surely, 2^8871389 is an apocalyptic number.

It is an amenable number.

8871389 is a deficient number, since it is larger than the sum of its proper divisors (1).

8871389 is an equidigital number, since it uses as much as digits as its factorization.

8871389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 8871389 is about 2978.4877035167. The cubic root of 8871389 is about 207.0128038631.

The spelling of 8871389 in words is "eight million, eight hundred seventy-one thousand, three hundred eighty-nine".