9919937 has 2 divisors, whose sum is σ = 9919938. Its totient is φ = 9919936.

The previous prime is 9919933. The next prime is 9919939. The reversal of 9919937 is 7399199.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9006001 + 913936 = 3001^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 9919937 - 2² = 9919933 is a prime.

Together with 9919939, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9919891 and 9919900.

It is not a weakly prime, because it can be changed into another prime (9919933) 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, 4959968 + 4959969.

It is an arithmetic number, because the mean of its divisors is an integer number (4959969).

Almost surely, 2^9919937 is an apocalyptic number.

It is an amenable number.

9919937 is a deficient number, since it is larger than the sum of its proper divisors (1).

9919937 is an equidigital number, since it uses as much as digits as its factorization.

9919937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137781, while the sum is 47.

The square root of 9919937 is about 3149.5931483288. The cubic root of 9919937 is about 214.8669593364.

The spelling of 9919937 in words is "nine million, nine hundred nineteen thousand, nine hundred thirty-seven".