9901801 has 16 divisors (see below), whose sum is σ = 12265344. Its totient is φ = 7784064.

The previous prime is 9901783. The next prime is 9901807. The reversal of 9901801 is 1081099.

It is not a de Polignac number, because 9901801 - 2⁹ = 9901289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9901801.

It is not an unprimeable number, because it can be changed into a prime (9901807) 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 in 15 ways as a sum of consecutive naturals, for example, 20970 + ... + 21436.

It is an arithmetic number, because the mean of its divisors is an integer number (766584).

Almost surely, 2^9901801 is an apocalyptic number.

9901801 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9901801 is a deficient number, since it is larger than the sum of its proper divisors (2363543).

9901801 is a wasteful number, since it uses less digits than its factorization.

9901801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 9901801 is about 3146.7127291826. The cubic root of 9901801 is about 214.7359368522.

The spelling of 9901801 in words is "nine million, nine hundred one thousand, eight hundred one".