2093809 has 3 divisors (see below), whose sum is σ = 2095257. Its totient is φ = 2092362.

The previous prime is 2093807. The next prime is 2093813. The reversal of 2093809 is 9083902.

It is a happy number.

The square root of 2093809 is 1447.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2093809 - 2¹ = 2093807 is a prime.

It is a super-2 number, since 2×2093809² = 8768072256962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2093801) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 724 + ... + 2170.

It is an arithmetic number, because the mean of its divisors is an integer number (698419).

2^2093809 is an apocalyptic number.

2093809 is the 1447-th square number.

2093809 is the 724-th centered octagonal number.

It is an amenable number.

2093809 is a deficient number, since it is larger than the sum of its proper divisors (1448).

2093809 is an frugal number, since it uses more digits than its factorization.

2093809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894 (or 1447 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The cubic root of 2093809 is about 127.9319503195.

The spelling of 2093809 in words is "two million, ninety-three thousand, eight hundred nine".