8678669 has 2 divisors, whose sum is σ = 8678670. Its totient is φ = 8678668.

The previous prime is 8678639. The next prime is 8678671. The reversal of 8678669 is 9668768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5822569 + 2856100 = 2413^2 + 1690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8678669 is a prime.

It is a super-2 number, since 2×8678669² = 150638591223122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 8678671, it forms a pair of twin primes.

It is a Chen 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 (8678639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4339334 + 4339335.

It is an arithmetic number, because the mean of its divisors is an integer number (4339335).

Almost surely, 2^8678669 is an apocalyptic number.

It is an amenable number.

8678669 is a deficient number, since it is larger than the sum of its proper divisors (1).

8678669 is an equidigital number, since it uses as much as digits as its factorization.

8678669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 8678669 is about 2945.9580784526. The cubic root of 8678669 is about 205.5027833147.

Subtracting 8678669 from its reverse (9668768), we obtain a palindrome (990099).

The spelling of 8678669 in words is "eight million, six hundred seventy-eight thousand, six hundred sixty-nine".