3505909 has 12 divisors (see below), whose sum is σ = 3937248. Its totient is φ = 3095400.

The previous prime is 3505889. The next prime is 3505921. The reversal of 3505909 is 9095053.

It is not a de Polignac number, because 3505909 - 2¹³ = 3497717 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3505949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49344 + ... + 49414.

It is an arithmetic number, because the mean of its divisors is an integer number (328104).

Almost surely, 2^3505909 is an apocalyptic number.

It is an amenable number.

3505909 is a deficient number, since it is larger than the sum of its proper divisors (431339).

3505909 is an equidigital number, since it uses as much as digits as its factorization.

3505909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 6075, while the sum is 31.

The square root of 3505909 is about 1872.4072740726. The cubic root of 3505909 is about 151.9148443840.

The spelling of 3505909 in words is "three million, five hundred five thousand, nine hundred nine".