4089309509 has 6 divisors (see below), whose sum is σ = 4127182290. Its totient is φ = 4051781136.

The previous prime is 4089309481. The next prime is 4089309533. The reversal of 4089309509 is 9059039804.

It can be written as a sum of positive squares in 3 ways, for example, as 1758544225 + 2330765284 = 41935^2 + 48278^2 .

It is not a de Polignac number, because 4089309509 - 2¹² = 4089305413 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 (4089309709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160214 + ... + 183975.

It is an arithmetic number, because the mean of its divisors is an integer number (687863715).

Almost surely, 2^4089309509 is an apocalyptic number.

It is an amenable number.

4089309509 is a deficient number, since it is larger than the sum of its proper divisors (37872781).

4089309509 is an equidigital number, since it uses as much as digits as its factorization.

4089309509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344407 (or 344298 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 4089309509 is about 63947.7091771081. The cubic root of 4089309509 is about 1599.1283675645.

The spelling of 4089309509 in words is "four billion, eighty-nine million, three hundred nine thousand, five hundred nine".