11311889 has 2 divisors, whose sum is σ = 11311890. Its totient is φ = 11311888.

The previous prime is 11311879. The next prime is 11311891. The reversal of 11311889 is 98811311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 1420864 = 3145^2 + 1192^2 .

It is an emirp because it is prime and its reverse (98811311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11311889 is a prime.

Together with 11311891, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₇₄₅₇₃₆ and since 11311889 and 745736 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11311879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655944 + 5655945.

It is an arithmetic number, because the mean of its divisors is an integer number (5655945).

Almost surely, 2^11311889 is an apocalyptic number.

It is an amenable number.

11311889 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311889 is an equidigital number, since it uses as much as digits as its factorization.

11311889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 32.

The square root of 11311889 is about 3363.3151799973. The cubic root of 11311889 is about 224.4803745392.

The spelling of 11311889 in words is "eleven million, three hundred eleven thousand, eight hundred eighty-nine".