3405509 has 2 divisors, whose sum is σ = 3405510. Its totient is φ = 3405508.

The previous prime is 3405473. The next prime is 3405527. The reversal of 3405509 is 9055043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2184484 + 1221025 = 1478^2 + 1105^2 .

It is an emirp because it is prime and its reverse (9055043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3405509 - 2²⁰ = 2356933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3405529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1702754 + 1702755.

It is an arithmetic number, because the mean of its divisors is an integer number (1702755).

Almost surely, 2^3405509 is an apocalyptic number.

It is an amenable number.

3405509 is a deficient number, since it is larger than the sum of its proper divisors (1).

3405509 is an equidigital number, since it uses as much as digits as its factorization.

3405509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 3405509 is about 1845.4021241995. The cubic root of 3405509 is about 150.4506300466.

The spelling of 3405509 in words is "three million, four hundred five thousand, five hundred nine".