8689997 has 2 divisors, whose sum is σ = 8689998. Its totient is φ = 8689996.

The previous prime is 8689987. The next prime is 8690041. The reversal of 8689997 is 7999868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5410276 + 3279721 = 2326^2 + 1811^2 .

It is a cyclic number.

It is not a de Polignac number, because 8689997 - 2⁴ = 8689981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8689957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4344998 + 4344999.

It is an arithmetic number, because the mean of its divisors is an integer number (4344999).

Almost surely, 2^8689997 is an apocalyptic number.

It is an amenable number.

8689997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8689997 is an equidigital number, since it uses as much as digits as its factorization.

8689997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 56.

The square root of 8689997 is about 2947.8800857565. The cubic root of 8689997 is about 205.5921565969.

The spelling of 8689997 in words is "eight million, six hundred eighty-nine thousand, nine hundred ninety-seven".