9991753 has 4 divisors (see below), whose sum is σ = 9998100. Its totient is φ = 9985408.

The previous prime is 9991727. The next prime is 9991757. The reversal of 9991753 is 3571999.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 425104 + 9566649 = 652^2 + 3093^2 .

It is a cyclic number.

It is not a de Polignac number, because 9991753 - 2¹⁷ = 9860681 is a prime.

It is a Duffinian number.

9991753 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9991757) 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 in 3 ways as a sum of consecutive naturals, for example, 1173 + ... + 4621.

It is an arithmetic number, because the mean of its divisors is an integer number (2499525).

Almost surely, 2^9991753 is an apocalyptic number.

It is an amenable number.

9991753 is a deficient number, since it is larger than the sum of its proper divisors (6347).

9991753 is a wasteful number, since it uses less digits than its factorization.

9991753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6346.

The product of its digits is 76545, while the sum is 43.

The square root of 9991753 is about 3160.9734260193. The cubic root of 9991753 is about 215.3842273050.

The spelling of 9991753 in words is "nine million, nine hundred ninety-one thousand, seven hundred fifty-three".