3521909 has 2 divisors, whose sum is σ = 3521910. Its totient is φ = 3521908.

The previous prime is 3521867. The next prime is 3521923. The reversal of 3521909 is 9091253.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3073009 + 448900 = 1753^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 3521909 - 2⁸ = 3521653 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3521929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760954 + 1760955.

It is an arithmetic number, because the mean of its divisors is an integer number (1760955).

Almost surely, 2^3521909 is an apocalyptic number.

It is an amenable number.

3521909 is a deficient number, since it is larger than the sum of its proper divisors (1).

3521909 is an equidigital number, since it uses as much as digits as its factorization.

3521909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 3521909 is about 1876.6749851799. The cubic root of 3521909 is about 152.1455928404.

The spelling of 3521909 in words is "three million, five hundred twenty-one thousand, nine hundred nine".