9997944 has 32 divisors (see below), whose sum is σ = 27267840. Its totient is φ = 3029600.

The previous prime is 9997937. The next prime is 9997951. The reversal of 9997944 is 4497999.

It is an interprime number because it is at equal distance from previous prime (9997937) and next prime (9997951).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18672 + ... + 19199.

It is an arithmetic number, because the mean of its divisors is an integer number (852120).

Almost surely, 2^9997944 is an apocalyptic number.

It is an amenable number.

9997944 is an abundant number, since it is smaller than the sum of its proper divisors (17269896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9997944 is a wasteful number, since it uses less digits than its factorization.

9997944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37891 (or 37887 counting only the distinct ones).

The product of its digits is 734832, while the sum is 51.

The square root of 9997944 is about 3161.9525613140. The cubic root of 9997944 is about 215.4287029321.

Subtracting from 9997944 its reverse (4497999), we obtain a palindrome (5499945).

The spelling of 9997944 in words is "nine million, nine hundred ninety-seven thousand, nine hundred forty-four".