8140909 has 24 divisors (see below), whose sum is σ = 10403640. Its totient is φ = 6322176.

The previous prime is 8140907. The next prime is 8140927. The reversal of 8140909 is 9090418.

8140909 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1432809 + 6708100 = 1197^2 + 2590^2 .

It is not a de Polignac number, because 8140909 - 2¹ = 8140907 is a prime.

It is a Duffinian number.

8140909 is a modest number, since divided by 909 gives 814 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8140907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23989 + ... + 24325.

It is an arithmetic number, because the mean of its divisors is an integer number (433485).

Almost surely, 2^8140909 is an apocalyptic number.

It is an amenable number.

8140909 is a deficient number, since it is larger than the sum of its proper divisors (2262731).

8140909 is a wasteful number, since it uses less digits than its factorization.

8140909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 8140909 is about 2853.2278212579. The cubic root of 8140909 is about 201.1674141294.

The spelling of 8140909 in words is "eight million, one hundred forty thousand, nine hundred nine".