11943961 has 4 divisors (see below), whose sum is σ = 11950900. Its totient is φ = 11937024.

The previous prime is 11943947. The next prime is 11943973. The reversal of 11943961 is 16934911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16934911 = 7 ⋅2419273.

It can be written as a sum of positive squares in 2 ways, for example, as 9884736 + 2059225 = 3144^2 + 1435^2 .

It is a cyclic number.

It is not a de Polignac number, because 11943961 - 2⁵ = 11943929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11943941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285 + ... + 5053.

It is an arithmetic number, because the mean of its divisors is an integer number (2987725).

Almost surely, 2^11943961 is an apocalyptic number.

It is an amenable number.

11943961 is a deficient number, since it is larger than the sum of its proper divisors (6939).

11943961 is an equidigital number, since it uses as much as digits as its factorization.

11943961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6938.

The product of its digits is 5832, while the sum is 34.

The square root of 11943961 is about 3456.0036168963. The cubic root of 11943961 is about 228.5859109685.

The spelling of 11943961 in words is "eleven million, nine hundred forty-three thousand, nine hundred sixty-one".