3723805 has 4 divisors (see below), whose sum is σ = 4468572. Its totient is φ = 2979040.

The previous prime is 3723787. The next prime is 3723809. The reversal of 3723805 is 5083273.

3723805 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 an emirpimes, since its reverse is a distinct semiprime: 5083273 = 13 ⋅391021.

It can be written as a sum of positive squares in 2 ways, for example, as 1879641 + 1844164 = 1371^2 + 1358^2 .

It is not a de Polignac number, because 3723805 - 2⁵ = 3723773 is a prime.

It is a Duffinian number.

3723805 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3723809) 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, 372376 + ... + 372385.

It is an arithmetic number, because the mean of its divisors is an integer number (1117143).

Almost surely, 2^3723805 is an apocalyptic number.

It is an amenable number.

3723805 is a deficient number, since it is larger than the sum of its proper divisors (744767).

3723805 is an equidigital number, since it uses as much as digits as its factorization.

3723805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744766.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 3723805 is about 1929.7163003924. The cubic root of 3723805 is about 154.9990287834. Note that the first 3 decimals are identical.

The spelling of 3723805 in words is "three million, seven hundred twenty-three thousand, eight hundred five".