8057909 has 4 divisors (see below), whose sum is σ = 8078604. Its totient is φ = 8037216.

The previous prime is 8057893. The next prime is 8057927. The reversal of 8057909 is 9097508.

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 4635409 + 3422500 = 2153^2 + 1850^2 .

It is a cyclic number.

It is not a de Polignac number, because 8057909 - 2⁴ = 8057893 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 (8057989) 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, 9752 + ... + 10545.

It is an arithmetic number, because the mean of its divisors is an integer number (2019651).

Almost surely, 2^8057909 is an apocalyptic number.

It is an amenable number.

8057909 is a deficient number, since it is larger than the sum of its proper divisors (20695).

8057909 is a wasteful number, since it uses less digits than its factorization.

8057909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20694.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 8057909 is about 2838.6456277598. The cubic root of 8057909 is about 200.4814152669.

The spelling of 8057909 in words is "eight million, fifty-seven thousand, nine hundred nine".