3729809 has 2 divisors, whose sum is σ = 3729810. Its totient is φ = 3729808.

The previous prime is 3729799. The next prime is 3729853. The reversal of 3729809 is 9089273.

3729809 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., 2356225 + 1373584 = 1535^2 + 1172^2 .

It is a cyclic number.

It is not a de Polignac number, because 3729809 - 2⁴ = 3729793 is a prime.

It is a super-2 number, since 2×3729809² = 27822950352962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3729899) 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, 1864904 + 1864905.

It is an arithmetic number, because the mean of its divisors is an integer number (1864905).

Almost surely, 2^3729809 is an apocalyptic number.

It is an amenable number.

3729809 is a deficient number, since it is larger than the sum of its proper divisors (1).

3729809 is an equidigital number, since it uses as much as digits as its factorization.

3729809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 3729809 is about 1931.2713429241. The cubic root of 3729809 is about 155.0822872125.

The spelling of 3729809 in words is "three million, seven hundred twenty-nine thousand, eight hundred nine".