8343989 has 2 divisors, whose sum is σ = 8343990. Its totient is φ = 8343988.

The previous prime is 8343971. The next prime is 8344001. The reversal of 8343989 is 9893438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4695889 + 3648100 = 2167^2 + 1910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8343989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8343289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4171994 + 4171995.

It is an arithmetic number, because the mean of its divisors is an integer number (4171995).

Almost surely, 2^8343989 is an apocalyptic number.

It is an amenable number.

8343989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8343989 is an equidigital number, since it uses as much as digits as its factorization.

8343989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 44.

The square root of 8343989 is about 2888.5963719426. The cubic root of 8343989 is about 202.8264429364.

The spelling of 8343989 in words is "eight million, three hundred forty-three thousand, nine hundred eighty-nine".