8366389 has 2 divisors, whose sum is σ = 8366390. Its totient is φ = 8366388.

The previous prime is 8366359. The next prime is 8366401. The reversal of 8366389 is 9836638.

8366389 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5244100 + 3122289 = 2290^2 + 1767^2 .

It is a cyclic number.

It is not a de Polignac number, because 8366389 - 2¹³ = 8358197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8366359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4183194 + 4183195.

It is an arithmetic number, because the mean of its divisors is an integer number (4183195).

Almost surely, 2^8366389 is an apocalyptic number.

It is an amenable number.

8366389 is a deficient number, since it is larger than the sum of its proper divisors (1).

8366389 is an equidigital number, since it uses as much as digits as its factorization.

8366389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 8366389 is about 2892.4710888788. The cubic root of 8366389 is about 203.0077811734.

It can be divided in two parts, 836 and 6389, that added together give a square (7225 = 85²).

The spelling of 8366389 in words is "eight million, three hundred sixty-six thousand, three hundred eighty-nine".