8279389 has 2 divisors, whose sum is σ = 8279390. Its totient is φ = 8279388.

The previous prime is 8279377. The next prime is 8279399. The reversal of 8279389 is 9839728.

8279389 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., 6502500 + 1776889 = 2550^2 + 1333^2 .

It is a cyclic number.

It is not a de Polignac number, because 8279389 - 2¹⁵ = 8246621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8279329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4139694 + 4139695.

It is an arithmetic number, because the mean of its divisors is an integer number (4139695).

Almost surely, 2^8279389 is an apocalyptic number.

It is an amenable number.

8279389 is a deficient number, since it is larger than the sum of its proper divisors (1).

8279389 is an equidigital number, since it uses as much as digits as its factorization.

8279389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 8279389 is about 2877.3927434398. The cubic root of 8279389 is about 202.3016520457.

It can be divided in two parts, 8279 and 389, that added together give a palindrome (8668).

The spelling of 8279389 in words is "eight million, two hundred seventy-nine thousand, three hundred eighty-nine".