9969638 has 16 divisors (see below), whose sum is σ = 17440800. Its totient is φ = 4272408.

The previous prime is 9969637. The next prime is 9969653. The reversal of 9969638 is 8369699.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9969637) 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 in 7 ways as a sum of consecutive naturals, for example, 6581 + ... + 7952.

It is an arithmetic number, because the mean of its divisors is an integer number (1090050).

Almost surely, 2^9969638 is an apocalyptic number.

9969638 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

9969638 is a deficient number, since it is larger than the sum of its proper divisors (7471162).

9969638 is a wasteful number, since it uses less digits than its factorization.

9969638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14556 (or 14542 counting only the distinct ones).

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

The square root of 9969638 is about 3157.4733569739. The cubic root of 9969638 is about 215.2252048025.

The spelling of 9969638 in words is "nine million, nine hundred sixty-nine thousand, six hundred thirty-eight".