9986659 has 2 divisors, whose sum is σ = 9986660. Its totient is φ = 9986658.

The previous prime is 9986653. The next prime is 9986693. The reversal of 9986659 is 9566899.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9986659 - 2³ = 9986651 is a prime.

9986659 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9986651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993329 + 4993330.

It is an arithmetic number, because the mean of its divisors is an integer number (4993330).

Almost surely, 2^9986659 is an apocalyptic number.

9986659 is a deficient number, since it is larger than the sum of its proper divisors (1).

9986659 is an equidigital number, since it uses as much as digits as its factorization.

9986659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 52.

The square root of 9986659 is about 3160.1675588487. The cubic root of 9986659 is about 215.3476186552.

The spelling of 9986659 in words is "nine million, nine hundred eighty-six thousand, six hundred fifty-nine".