3021240809 has 4 divisors (see below), whose sum is σ = 3102896004. Its totient is φ = 2939585616.

The previous prime is 3021240791. The next prime is 3021240821. The reversal of 3021240809 is 9080421203.

3021240809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2273382400 + 747858409 = 47680^2 + 27347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3021240809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3021240869) 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, 40827542 + ... + 40827615.

It is an arithmetic number, because the mean of its divisors is an integer number (775724001).

Almost surely, 2^3021240809 is an apocalyptic number.

It is an amenable number.

3021240809 is a deficient number, since it is larger than the sum of its proper divisors (81655195).

3021240809 is an equidigital number, since it uses as much as digits as its factorization.

3021240809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81655194.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 3021240809 is about 54965.8149125436. The cubic root of 3021240809 is about 1445.6454070211.

The spelling of 3021240809 in words is "three billion, twenty-one million, two hundred forty thousand, eight hundred nine".