9911144 has 8 divisors (see below), whose sum is σ = 18583410. Its totient is φ = 4955568.

The previous prime is 9911131. The next prime is 9911147. The reversal of 9911144 is 4411199.

It can be written as a sum of positive squares in only one way, i.e., 9796900 + 114244 = 3130^2 + 338^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9911147) 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 as a sum of consecutive naturals, namely, 619439 + ... + 619454.

Almost surely, 2^9911144 is an apocalyptic number.

It is an amenable number.

9911144 is a deficient number, since it is larger than the sum of its proper divisors (8672266).

9911144 is a wasteful number, since it uses less digits than its factorization.

9911144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238899 (or 1238895 counting only the distinct ones).

The product of its digits is 1296, while the sum is 29.

The square root of 9911144 is about 3148.1969442841. The cubic root of 9911144 is about 214.8034547772.

Subtracting from 9911144 its reverse (4411199), we obtain a palindrome (5499945).

The spelling of 9911144 in words is "nine million, nine hundred eleven thousand, one hundred forty-four".