3701809 has 2 divisors, whose sum is σ = 3701810. Its totient is φ = 3701808.

The previous prime is 3701807. The next prime is 3701839. The reversal of 3701809 is 9081073.

3701809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3610000 + 91809 = 1900^2 + 303^2 .

It is a cyclic number.

It is not a de Polignac number, because 3701809 - 2¹ = 3701807 is a prime.

Together with 3701807, it forms a pair of twin primes.

3701809 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3701807) 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, 1850904 + 1850905.

It is an arithmetic number, because the mean of its divisors is an integer number (1850905).

Almost surely, 2^3701809 is an apocalyptic number.

It is an amenable number.

3701809 is a deficient number, since it is larger than the sum of its proper divisors (1).

3701809 is an equidigital number, since it uses as much as digits as its factorization.

3701809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 3701809 is about 1924.0085758645. The cubic root of 3701809 is about 154.6932399802.

The spelling of 3701809 in words is "three million, seven hundred one thousand, eight hundred nine".