3722009 has 2 divisors, whose sum is σ = 3722010. Its totient is φ = 3722008.

The previous prime is 3721981. The next prime is 3722011. The reversal of 3722009 is 9002273.

3722009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3705625 + 16384 = 1925^2 + 128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3722009 is a prime.

Together with 3722011, 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 (3722029) 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, 1861004 + 1861005.

It is an arithmetic number, because the mean of its divisors is an integer number (1861005).

Almost surely, 2^3722009 is an apocalyptic number.

It is an amenable number.

3722009 is a deficient number, since it is larger than the sum of its proper divisors (1).

3722009 is an equidigital number, since it uses as much as digits as its factorization.

3722009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 3722009 is about 1929.2508908900. The cubic root of 3722009 is about 154.9741059762.

The spelling of 3722009 in words is "three million, seven hundred twenty-two thousand, nine".