2438951909 has 4 divisors (see below), whose sum is σ = 2441733804. Its totient is φ = 2436170016.

The previous prime is 2438951899. The next prime is 2438951917. The reversal of 2438951909 is 9091598342.

It is a happy number.

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 2009011684 + 429940225 = 44822^2 + 20735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2438951909 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 (2438951309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389632 + ... + 1391385.

It is an arithmetic number, because the mean of its divisors is an integer number (610433451).

Almost surely, 2^2438951909 is an apocalyptic number.

It is an amenable number.

2438951909 is a deficient number, since it is larger than the sum of its proper divisors (2781895).

2438951909 is an equidigital number, since it uses as much as digits as its factorization.

2438951909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781894.

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 2438951909 is about 49385.7460103621. The cubic root of 2438951909 is about 1346.0703114316.

The spelling of 2438951909 in words is "two billion, four hundred thirty-eight million, nine hundred fifty-one thousand, nine hundred nine".