3726409 has 2 divisors, whose sum is σ = 3726410. Its totient is φ = 3726408.

The previous prime is 3726407. The next prime is 3726419. The reversal of 3726409 is 9046273.

3726409 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., 3168400 + 558009 = 1780^2 + 747^2 .

It is a cyclic number.

It is not a de Polignac number, because 3726409 - 2¹ = 3726407 is a prime.

It is a super-2 number, since 2×3726409² = 27772248070562, which contains 22 as substring.

Together with 3726407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3726403) 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, 1863204 + 1863205.

It is an arithmetic number, because the mean of its divisors is an integer number (1863205).

Almost surely, 2^3726409 is an apocalyptic number.

It is an amenable number.

3726409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3726409 is an equidigital number, since it uses as much as digits as its factorization.

3726409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 3726409 is about 1930.3908930577. The cubic root of 3726409 is about 155.0351498501.

The spelling of 3726409 in words is "three million, seven hundred twenty-six thousand, four hundred nine".