11838961 has 4 divisors (see below), whose sum is σ = 11847024. Its totient is φ = 11830900.

The previous prime is 11838943. The next prime is 11838977. The reversal of 11838961 is 16983811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16983811 = 13 ⋅1306447.

It is a cyclic number.

It is not a de Polignac number, because 11838961 - 2⁵ = 11838929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11838961.

It is not an unprimeable number, because it can be changed into a prime (11838901) 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 in 3 ways as a sum of consecutive naturals, for example, 1135 + ... + 4996.

It is an arithmetic number, because the mean of its divisors is an integer number (2961756).

Almost surely, 2^11838961 is an apocalyptic number.

It is an amenable number.

11838961 is a deficient number, since it is larger than the sum of its proper divisors (8063).

11838961 is an equidigital number, since it uses as much as digits as its factorization.

11838961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8062.

The product of its digits is 10368, while the sum is 37.

The square root of 11838961 is about 3440.7791268839. The cubic root of 11838961 is about 227.9141014780.

The spelling of 11838961 in words is "eleven million, eight hundred thirty-eight thousand, nine hundred sixty-one".