9943849 has 2 divisors, whose sum is σ = 9943850. Its totient is φ = 9943848.

The previous prime is 9943819. The next prime is 9943873. The reversal of 9943849 is 9483499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6985449 + 2958400 = 2643^2 + 1720^2 .

It is an emirp because it is prime and its reverse (9483499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9943849 - 2⁷ = 9943721 is a prime.

It is a super-3 number, since 3×9943849³ (a number of 22 digits) contains 333 as substring.

9943849 is a lucky number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 9943799 and 9943808.

It is not a weakly prime, because it can be changed into another prime (9943819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971924 + 4971925.

It is an arithmetic number, because the mean of its divisors is an integer number (4971925).

Almost surely, 2^9943849 is an apocalyptic number.

It is an amenable number.

9943849 is a deficient number, since it is larger than the sum of its proper divisors (1).

9943849 is an equidigital number, since it uses as much as digits as its factorization.

9943849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 46.

The square root of 9943849 is about 3153.3869093405. The cubic root of 9943849 is about 215.0394663443.

The spelling of 9943849 in words is "nine million, nine hundred forty-three thousand, eight hundred forty-nine".