8426989 has 2 divisors, whose sum is σ = 8426990. Its totient is φ = 8426988.

The previous prime is 8426983. The next prime is 8427031. The reversal of 8426989 is 9896248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6086089 + 2340900 = 2467^2 + 1530^2 .

It is a cyclic number.

It is not a de Polignac number, because 8426989 - 2⁹ = 8426477 is a prime.

It is a super-2 number, since 2×8426989² = 142028287212242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8426983) 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, 4213494 + 4213495.

It is an arithmetic number, because the mean of its divisors is an integer number (4213495).

Almost surely, 2^8426989 is an apocalyptic number.

It is an amenable number.

8426989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8426989 is an equidigital number, since it uses as much as digits as its factorization.

8426989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 46.

The square root of 8426989 is about 2902.9276601390. The cubic root of 8426989 is about 203.4967490984.

The spelling of 8426989 in words is "eight million, four hundred twenty-six thousand, nine hundred eighty-nine".