9409378909 has 12 divisors (see below), whose sum is σ = 11589464124. Its totient is φ = 7590758784.

The previous prime is 9409378861. The next prime is 9409378931. The reversal of 9409378909 is 9098739049.

It can be written as a sum of positive squares in 2 ways, for example, as 4465179684 + 4944199225 = 66822^2 + 70315^2 .

It is not a de Polignac number, because 9409378909 - 2¹¹ = 9409376861 is a prime.

It is a super-2 number, since 2×9409378909² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9409378969) 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 11 ways as a sum of consecutive naturals, for example, 5647054 + ... + 5648719.

It is an arithmetic number, because the mean of its divisors is an integer number (965788677).

Almost surely, 2^9409378909 is an apocalyptic number.

It is an amenable number.

9409378909 is a deficient number, since it is larger than the sum of its proper divisors (2180085215).

9409378909 is a wasteful number, since it uses less digits than its factorization.

9409378909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11295804 (or 11295797 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 58.

The square root of 9409378909 is about 97001.9531195120. The cubic root of 9409378909 is about 2111.1559675152.

The spelling of 9409378909 in words is "nine billion, four hundred nine million, three hundred seventy-eight thousand, nine hundred nine".