11864543 has 2 divisors, whose sum is σ = 11864544. Its totient is φ = 11864542.

The previous prime is 11864507. The next prime is 11864549. The reversal of 11864543 is 34546811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11864543 - 2¹⁰ = 11863519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11864549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5932271 + 5932272.

It is an arithmetic number, because the mean of its divisors is an integer number (5932272).

Almost surely, 2^11864543 is an apocalyptic number.

11864543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11864543 is an equidigital number, since it uses as much as digits as its factorization.

11864543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 11864543 is about 3444.4945928249. The cubic root of 11864543 is about 228.0781447023.

The spelling of 11864543 in words is "eleven million, eight hundred sixty-four thousand, five hundred forty-three".