11533861 has 2 divisors, whose sum is σ = 11533862. Its totient is φ = 11533860.

The previous prime is 11533859. The next prime is 11533867. The reversal of 11533861 is 16833511.

11533861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9828225 + 1705636 = 3135^2 + 1306^2 .

It is a cyclic number.

It is not a de Polignac number, because 11533861 - 2¹ = 11533859 is a prime.

It is a super-4 number, since 4×11533861⁴ (a number of 29 digits) contains 4444 as substring.

Together with 11533859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11533867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5766930 + 5766931.

It is an arithmetic number, because the mean of its divisors is an integer number (5766931).

Almost surely, 2^11533861 is an apocalyptic number.

It is an amenable number.

11533861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11533861 is an equidigital number, since it uses as much as digits as its factorization.

11533861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 11533861 is about 3396.1538539943. The cubic root of 11533861 is about 225.9391918790.

The spelling of 11533861 in words is "eleven million, five hundred thirty-three thousand, eight hundred sixty-one".