8947558889 has 4 divisors (see below), whose sum is σ = 8968812420. Its totient is φ = 8926305360.

The previous prime is 8947558859. The next prime is 8947558891. The reversal of 8947558889 is 9888557498.

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 1687155625 + 7260403264 = 41075^2 + 85208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8947558889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8947558859) 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, 10626134 + ... + 10626975.

It is an arithmetic number, because the mean of its divisors is an integer number (2242203105).

Almost surely, 2^8947558889 is an apocalyptic number.

It is an amenable number.

8947558889 is a deficient number, since it is larger than the sum of its proper divisors (21253531).

8947558889 is a wasteful number, since it uses less digits than its factorization.

8947558889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21253530.

The product of its digits is 232243200, while the sum is 71.

The square root of 8947558889 is about 94591.5370897418. The cubic root of 8947558889 is about 2076.0358800536.

The spelling of 8947558889 in words is "eight billion, nine hundred forty-seven million, five hundred fifty-eight thousand, eight hundred eighty-nine".