8947889 has 2 divisors, whose sum is σ = 8947890. Its totient is φ = 8947888.

The previous prime is 8947853. The next prime is 8947891. The reversal of 8947889 is 9887498.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6801664 + 2146225 = 2608^2 + 1465^2 .

It is a cyclic number.

It is not a de Polignac number, because 8947889 - 2¹⁶ = 8882353 is a prime.

Together with 8947891, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8947889.

It is not a weakly prime, because it can be changed into another prime (8947819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4473944 + 4473945.

It is an arithmetic number, because the mean of its divisors is an integer number (4473945).

Almost surely, 2^8947889 is an apocalyptic number.

It is an amenable number.

8947889 is a deficient number, since it is larger than the sum of its proper divisors (1).

8947889 is an equidigital number, since it uses as much as digits as its factorization.

8947889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 53.

The square root of 8947889 is about 2991.3022247844. The cubic root of 8947889 is about 207.6061410811.

The spelling of 8947889 in words is "eight million, nine hundred forty-seven thousand, eight hundred eighty-nine".