3309729409 has 4 divisors (see below), whose sum is σ = 3782547904. Its totient is φ = 2836910916.

The previous prime is 3309729391. The next prime is 3309729421. The reversal of 3309729409 is 9049279033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3309729409 - 2⁹ = 3309728897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3309729209) 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, 236409237 + ... + 236409250.

It is an arithmetic number, because the mean of its divisors is an integer number (945636976).

Almost surely, 2^3309729409 is an apocalyptic number.

It is an amenable number.

3309729409 is a deficient number, since it is larger than the sum of its proper divisors (472818495).

3309729409 is an equidigital number, since it uses as much as digits as its factorization.

3309729409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472818494.

The product of its (nonzero) digits is 367416, while the sum is 46.

The square root of 3309729409 is about 57530.2477745403. The cubic root of 3309729409 is about 1490.2672686932.

The spelling of 3309729409 in words is "three billion, three hundred nine million, seven hundred twenty-nine thousand, four hundred nine".