8659997 has 2 divisors, whose sum is σ = 8659998. Its totient is φ = 8659996.

The previous prime is 8659957. The next prime is 8659999. The reversal of 8659997 is 7999568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5635876 + 3024121 = 2374^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 8659997 - 2⁸ = 8659741 is a prime.

Together with 8659999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8659999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4329998 + 4329999.

It is an arithmetic number, because the mean of its divisors is an integer number (4329999).

Almost surely, 2^8659997 is an apocalyptic number.

It is an amenable number.

8659997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8659997 is an equidigital number, since it uses as much as digits as its factorization.

8659997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 53.

The square root of 8659997 is about 2942.7872841916. The cubic root of 8659997 is about 205.3552989821.

The spelling of 8659997 in words is "eight million, six hundred fifty-nine thousand, nine hundred ninety-seven".