9961544 has 32 divisors (see below), whose sum is σ = 19251000. Its totient is φ = 4830720.

The previous prime is 9961543. The next prime is 9961573. The reversal of 9961544 is 4451699.

It can be written as a sum of positive squares in 4 ways, for example, as 4153444 + 5808100 = 2038^2 + 2410^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 9961498 and 9961507.

It is not an unprimeable number, because it can be changed into a prime (9961543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66782 + ... + 66930.

Almost surely, 2^9961544 is an apocalyptic number.

It is an amenable number.

9961544 is a deficient number, since it is larger than the sum of its proper divisors (9289456).

9961544 is a wasteful number, since it uses less digits than its factorization.

9961544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 349 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 9961544 is about 3156.1913756932. The cubic root of 9961544 is about 215.1669444306.

The spelling of 9961544 in words is "nine million, nine hundred sixty-one thousand, five hundred forty-four".