9901312 has 18 divisors (see below), whose sum is σ = 19764458. Its totient is φ = 4950528.

The previous prime is 9901303. The next prime is 9901313. The reversal of 9901312 is 2131099.

It can be written as a sum of positive squares in only one way, i.e., 5837056 + 4064256 = 2416^2 + 2016^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9901313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19083 + ... + 19594.

Almost surely, 2^9901312 is an apocalyptic number.

It is an amenable number.

9901312 is a deficient number, since it is larger than the sum of its proper divisors (9863146).

9901312 is an equidigital number, since it uses as much as digits as its factorization.

9901312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38693 (or 38679 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 9901312 is about 3146.6350280895. The cubic root of 9901312 is about 214.7324018858.

The spelling of 9901312 in words is "nine million, nine hundred one thousand, three hundred twelve".