9896639 has 2 divisors, whose sum is σ = 9896640. Its totient is φ = 9896638.

The previous prime is 9896629. The next prime is 9896641. The reversal of 9896639 is 9366989.

It is a strong prime.

It is an emirp because it is prime and its reverse (9366989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9896639 - 2¹² = 9892543 is a prime.

It is a super-3 number, since 3×9896639³ (a number of 22 digits) contains 333 as substring.

Together with 9896641, 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 (9896629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948319 + 4948320.

It is an arithmetic number, because the mean of its divisors is an integer number (4948320).

Almost surely, 2^9896639 is an apocalyptic number.

9896639 is a deficient number, since it is larger than the sum of its proper divisors (1).

9896639 is an equidigital number, since it uses as much as digits as its factorization.

9896639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 50.

The square root of 9896639 is about 3145.8924012115. The cubic root of 9896639 is about 214.6986150363.

The spelling of 9896639 in words is "nine million, eight hundred ninety-six thousand, six hundred thirty-nine".