9991337 has 2 divisors, whose sum is σ = 9991338. Its totient is φ = 9991336.

The previous prime is 9991313. The next prime is 9991343. The reversal of 9991337 is 7331999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8620096 + 1371241 = 2936^2 + 1171^2 .

It is an emirp because it is prime and its reverse (7331999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9991337 - 2¹⁸ = 9729193 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9991294 and 9991303.

It is not a weakly prime, because it can be changed into another prime (9991357) by changing a digit.

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 as a sum of consecutive naturals, namely, 4995668 + 4995669.

It is an arithmetic number, because the mean of its divisors is an integer number (4995669).

Almost surely, 2^9991337 is an apocalyptic number.

It is an amenable number.

9991337 is a deficient number, since it is larger than the sum of its proper divisors (1).

9991337 is an equidigital number, since it uses as much as digits as its factorization.

9991337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45927, while the sum is 41.

The square root of 9991337 is about 3160.9076228197. The cubic root of 9991337 is about 215.3812381371.

The spelling of 9991337 in words is "nine million, nine hundred ninety-one thousand, three hundred thirty-seven".