3506309 has 4 divisors (see below), whose sum is σ = 3521100. Its totient is φ = 3491520.

The previous prime is 3506297. The next prime is 3506323. The reversal of 3506309 is 9036053.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9036053 = 13 ⋅695081.

It can be written as a sum of positive squares in 2 ways, for example, as 2788900 + 717409 = 1670^2 + 847^2 .

It is a cyclic number.

It is not a de Polignac number, because 3506309 - 2²⁰ = 2457733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3506329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7034 + ... + 7515.

It is an arithmetic number, because the mean of its divisors is an integer number (880275).

Almost surely, 2^3506309 is an apocalyptic number.

It is an amenable number.

3506309 is a deficient number, since it is larger than the sum of its proper divisors (14791).

3506309 is a wasteful number, since it uses less digits than its factorization.

3506309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14790.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 3506309 is about 1872.5140853943. The cubic root of 3506309 is about 151.9206216424.

The spelling of 3506309 in words is "three million, five hundred six thousand, three hundred nine".