4097809 has 4 divisors (see below), whose sum is σ = 4149760. Its totient is φ = 4045860.

The previous prime is 4097783. The next prime is 4097813. The reversal of 4097809 is 9087904.

It is a happy number.

4097809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4097809 - 2⁵ = 4097777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4097869) 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 in 3 ways as a sum of consecutive naturals, for example, 25857 + ... + 26014.

It is an arithmetic number, because the mean of its divisors is an integer number (1037440).

Almost surely, 2^4097809 is an apocalyptic number.

It is an amenable number.

4097809 is a deficient number, since it is larger than the sum of its proper divisors (51951).

4097809 is an equidigital number, since it uses as much as digits as its factorization.

4097809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51950.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 4097809 is about 2024.3045719456. The cubic root of 4097809 is about 160.0235512207.

The spelling of 4097809 in words is "four million, ninety-seven thousand, eight hundred nine".