11009961 has 6 divisors (see below), whose sum is σ = 15903290. Its totient is φ = 7339968.

The previous prime is 11009959. The next prime is 11009983. The reversal of 11009961 is 16990011.

It can be written as a sum of positive squares in only one way, i.e., 10989225 + 20736 = 3315^2 + 144^2 .

It is not a de Polignac number, because 11009961 - 2¹ = 11009959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11009261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 611656 + ... + 611673.

Almost surely, 2^11009961 is an apocalyptic number.

It is an amenable number.

11009961 is a deficient number, since it is larger than the sum of its proper divisors (4893329).

11009961 is a wasteful number, since it uses less digits than its factorization.

11009961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223335 (or 1223332 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 11009961 is about 3318.1261278017. The cubic root of 11009961 is about 222.4651193059.

Adding to 11009961 its reverse (16990011), we get a palindrome (27999972).

The spelling of 11009961 in words is "eleven million, nine thousand, nine hundred sixty-one".