11885569 has 2 divisors, whose sum is σ = 11885570. Its totient is φ = 11885568.

The previous prime is 11885561. The next prime is 11885597. The reversal of 11885569 is 96558811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7219969 + 4665600 = 2687^2 + 2160^2 .

It is an emirp because it is prime and its reverse (96558811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11885569 - 2³ = 11885561 is a prime.

It is a super-2 number, since 2×11885569² = 282533500907522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11885561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5942784 + 5942785.

It is an arithmetic number, because the mean of its divisors is an integer number (5942785).

Almost surely, 2^11885569 is an apocalyptic number.

It is an amenable number.

11885569 is a deficient number, since it is larger than the sum of its proper divisors (1).

11885569 is an equidigital number, since it uses as much as digits as its factorization.

11885569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 43.

The square root of 11885569 is about 3447.5453586574. The cubic root of 11885569 is about 228.2127963558.

The spelling of 11885569 in words is "eleven million, eight hundred eighty-five thousand, five hundred sixty-nine".