4398091 has 2 divisors, whose sum is σ = 4398092. Its totient is φ = 4398090.

The previous prime is 4398089. The next prime is 4398131. The reversal of 4398091 is 1908934.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4398091 - 2¹ = 4398089 is a prime.

Together with 4398089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4398011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2199045 + 2199046.

It is an arithmetic number, because the mean of its divisors is an integer number (2199046).

Almost surely, 2^4398091 is an apocalyptic number.

4398091 is a deficient number, since it is larger than the sum of its proper divisors (1).

4398091 is an equidigital number, since it uses as much as digits as its factorization.

4398091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 4398091 is about 2097.1626069525. The cubic root of 4398091 is about 163.8405524450.

The spelling of 4398091 in words is "four million, three hundred ninety-eight thousand, ninety-one".