8628889 has 2 divisors, whose sum is σ = 8628890. Its totient is φ = 8628888.

The previous prime is 8628883. The next prime is 8628899. The reversal of 8628889 is 9888268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8363664 + 265225 = 2892^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 8628889 - 2⁵ = 8628857 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8628883) 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 as a sum of consecutive naturals, namely, 4314444 + 4314445.

It is an arithmetic number, because the mean of its divisors is an integer number (4314445).

Almost surely, 2^8628889 is an apocalyptic number.

It is an amenable number.

8628889 is a deficient number, since it is larger than the sum of its proper divisors (1).

8628889 is an equidigital number, since it uses as much as digits as its factorization.

8628889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 442368, while the sum is 49.

The square root of 8628889 is about 2937.4970638283. The cubic root of 8628889 is about 205.1091150225.

The spelling of 8628889 in words is "eight million, six hundred twenty-eight thousand, eight hundred eighty-nine".