8547557209 has 9 divisors (see below), whose sum is σ = 8700438837. Its totient is φ = 8397321084.

The previous prime is 8547557203. The next prime is 8547557231. The reversal of 8547557209 is 9027557458.

It is a happy number.

The square root of 8547557209 is 92453.

It is a perfect power (a square), and thus also a powerful number.

8547557209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8547557209 - 2¹⁵ = 8547524441 is a prime.

It is a super-2 number, since 2×8547557209² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8547557203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5453944 + ... + 5455510.

Almost surely, 2^8547557209 is an apocalyptic number.

8547557209 is the 92453-rd square number.

8547557209 is the 46227-th centered octagonal number.

It is an amenable number.

8547557209 is a deficient number, since it is larger than the sum of its proper divisors (152881628).

8547557209 is an frugal number, since it uses more digits than its factorization.

8547557209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 52.

The cubic root of 8547557209 is about 2044.6265946632.

The spelling of 8547557209 in words is "eight billion, five hundred forty-seven million, five hundred fifty-seven thousand, two hundred nine".