4397389 has 2 divisors, whose sum is σ = 4397390. Its totient is φ = 4397388.

The previous prime is 4397383. The next prime is 4397399. The reversal of 4397389 is 9837934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3674889 + 722500 = 1917^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 4397389 - 2⁹ = 4396877 is a prime.

4397389 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4397383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2198694 + 2198695.

It is an arithmetic number, because the mean of its divisors is an integer number (2198695).

Almost surely, 2^4397389 is an apocalyptic number.

It is an amenable number.

4397389 is a deficient number, since it is larger than the sum of its proper divisors (1).

4397389 is an equidigital number, since it uses as much as digits as its factorization.

4397389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 4397389 is about 2096.9952312774. The cubic root of 4397389 is about 163.8318348606.

The spelling of 4397389 in words is "four million, three hundred ninety-seven thousand, three hundred eighty-nine".