2940843309 has 4 divisors (see below), whose sum is σ = 3921124416. Its totient is φ = 1960562204.

The previous prime is 2940843289. The next prime is 2940843317. The reversal of 2940843309 is 9033480492.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 2940843309 - 2²⁰ = 2939794733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2940843709) 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, 490140549 + ... + 490140554.

It is an arithmetic number, because the mean of its divisors is an integer number (980281104).

Almost surely, 2^2940843309 is an apocalyptic number.

It is an amenable number.

2940843309 is a deficient number, since it is larger than the sum of its proper divisors (980281107).

2940843309 is an equidigital number, since it uses as much as digits as its factorization.

2940843309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980281106.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 2940843309 is about 54229.5427696011. The cubic root of 2940843309 is about 1432.7067109087.

The spelling of 2940843309 in words is "two billion, nine hundred forty million, eight hundred forty-three thousand, three hundred nine".