11864549 has 2 divisors, whose sum is σ = 11864550. Its totient is φ = 11864548.

The previous prime is 11864543. The next prime is 11864551. The reversal of 11864549 is 94546811.

11864549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11175649 + 688900 = 3343^2 + 830^2 .

It is a cyclic number.

It is not a de Polignac number, because 11864549 - 2¹⁶ = 11799013 is a prime.

Together with 11864551, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₇₇₉₇₂₆ and since 11864549 and 779726 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11864543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5932274 + 5932275.

It is an arithmetic number, because the mean of its divisors is an integer number (5932275).

Almost surely, 2^11864549 is an apocalyptic number.

It is an amenable number.

11864549 is a deficient number, since it is larger than the sum of its proper divisors (1).

11864549 is an equidigital number, since it uses as much as digits as its factorization.

11864549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 11864549 is about 3444.4954637799. The cubic root of 11864549 is about 228.0781831493.

The spelling of 11864549 in words is "eleven million, eight hundred sixty-four thousand, five hundred forty-nine".