8670989 has 2 divisors, whose sum is σ = 8670990. Its totient is φ = 8670988.

The previous prime is 8670947. The next prime is 8670997. The reversal of 8670989 is 9890768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8655364 + 15625 = 2942^2 + 125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8670989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8670919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4335494 + 4335495.

It is an arithmetic number, because the mean of its divisors is an integer number (4335495).

Almost surely, 2^8670989 is an apocalyptic number.

It is an amenable number.

8670989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8670989 is an equidigital number, since it uses as much as digits as its factorization.

8670989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 8670989 is about 2944.6543090828. The cubic root of 8670989 is about 205.4421470138.

The spelling of 8670989 in words is "eight million, six hundred seventy thousand, nine hundred eighty-nine".