9991801753 has 2 divisors, whose sum is σ = 9991801754. Its totient is φ = 9991801752.

The previous prime is 9991801709. The next prime is 9991801777. The reversal of 9991801753 is 3571081999.

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., 5173637184 + 4818164569 = 71928^2 + 69413^2 .

It is a cyclic number.

It is not a de Polignac number, because 9991801753 - 2²¹ = 9989704601 is a prime.

It is a super-2 number, since 2×9991801753² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9991801753.

It is not a weakly prime, because it can be changed into another prime (9991801783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995900876 + 4995900877.

It is an arithmetic number, because the mean of its divisors is an integer number (4995900877).

Almost surely, 2^9991801753 is an apocalyptic number.

It is an amenable number.

9991801753 is a deficient number, since it is larger than the sum of its proper divisors (1).

9991801753 is an equidigital number, since it uses as much as digits as its factorization.

9991801753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 52.

The square root of 9991801753 is about 99959.0003601477. Note that the first 3 decimals coincide. The cubic root of 9991801753 is about 2153.8457761427.

The spelling of 9991801753 in words is "nine billion, nine hundred ninety-one million, eight hundred one thousand, seven hundred fifty-three".