2073809 has 2 divisors, whose sum is σ = 2073810. Its totient is φ = 2073808.

The previous prime is 2073787. The next prime is 2073811. The reversal of 2073809 is 9083702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1890625 + 183184 = 1375^2 + 428^2 .

It is a cyclic number.

It is not a de Polignac number, because 2073809 - 2¹² = 2069713 is a prime.

Together with 2073811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2073859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1036904 + 1036905.

It is an arithmetic number, because the mean of its divisors is an integer number (1036905).

2^2073809 is an apocalyptic number.

It is an amenable number.

2073809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2073809 is an equidigital number, since it uses as much as digits as its factorization.

2073809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2073809 is about 1440.0725676160. The cubic root of 2073809 is about 127.5233124103.

It can be divided in two parts, 2073 and 809, that added together give a palindrome (2882).

The spelling of 2073809 in words is "two million, seventy-three thousand, eight hundred nine".