3309745 has 4 divisors (see below), whose sum is σ = 3971700. Its totient is φ = 2647792.

The previous prime is 3309739. The next prime is 3309749. The reversal of 3309745 is 5479033.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2226064 + 1083681 = 1492^2 + 1041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3309745 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3309749) 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, 330970 + ... + 330979.

It is an arithmetic number, because the mean of its divisors is an integer number (992925).

Almost surely, 2^3309745 is an apocalyptic number.

It is an amenable number.

3309745 is a deficient number, since it is larger than the sum of its proper divisors (661955).

3309745 is an equidigital number, since it uses as much as digits as its factorization.

3309745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661954.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 3309745 is about 1819.2704581782. The cubic root of 3309745 is about 149.0269608736.

The spelling of 3309745 in words is "three million, three hundred nine thousand, seven hundred forty-five".