4397909 has 2 divisors, whose sum is σ = 4397910. Its totient is φ = 4397908.

The previous prime is 4397893. The next prime is 4397923. The reversal of 4397909 is 9097934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3010225 + 1387684 = 1735^2 + 1178^2 .

It is a cyclic number.

It is not a de Polignac number, because 4397909 - 2⁴ = 4397893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4397959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2198954 + 2198955.

It is an arithmetic number, because the mean of its divisors is an integer number (2198955).

Almost surely, 2^4397909 is an apocalyptic number.

It is an amenable number.

4397909 is a deficient number, since it is larger than the sum of its proper divisors (1).

4397909 is an equidigital number, since it uses as much as digits as its factorization.

4397909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 4397909 is about 2097.1192145417. The cubic root of 4397909 is about 163.8382924196.

The spelling of 4397909 in words is "four million, three hundred ninety-seven thousand, nine hundred nine".