8557939 has 4 divisors (see below), whose sum is σ = 9216256. Its totient is φ = 7899624.

The previous prime is 8557937. The next prime is 8557981. The reversal of 8557939 is 9397558.

8557939 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9397558 = 2 ⋅4698779.

It is a cyclic number.

It is not a de Polignac number, because 8557939 - 2¹ = 8557937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8557931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329139 + ... + 329164.

It is an arithmetic number, because the mean of its divisors is an integer number (2304064).

Almost surely, 2^8557939 is an apocalyptic number.

8557939 is a deficient number, since it is larger than the sum of its proper divisors (658317).

8557939 is a wasteful number, since it uses less digits than its factorization.

8557939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658316.

The product of its digits is 340200, while the sum is 46.

The square root of 8557939 is about 2925.3955288132. The cubic root of 8557939 is about 204.5454055159.

The spelling of 8557939 in words is "eight million, five hundred fifty-seven thousand, nine hundred thirty-nine".