11785889 has 2 divisors, whose sum is σ = 11785890. Its totient is φ = 11785888.

The previous prime is 11785883. The next prime is 11785933. The reversal of 11785889 is 98858711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11785489 + 400 = 3433^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 11785889 - 2⁸ = 11785633 is a prime.

It is not a weakly prime, because it can be changed into another prime (11785883) 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 as a sum of consecutive naturals, namely, 5892944 + 5892945.

It is an arithmetic number, because the mean of its divisors is an integer number (5892945).

Almost surely, 2^11785889 is an apocalyptic number.

It is an amenable number.

11785889 is a deficient number, since it is larger than the sum of its proper divisors (1).

11785889 is an equidigital number, since it uses as much as digits as its factorization.

11785889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 47.

The square root of 11785889 is about 3433.0582575890. The cubic root of 11785889 is about 227.5730249009.

The spelling of 11785889 in words is "eleven million, seven hundred eighty-five thousand, eight hundred eighty-nine".