11951189 has 2 divisors, whose sum is σ = 11951190. Its totient is φ = 11951188.

The previous prime is 11951179. The next prime is 11951243. The reversal of 11951189 is 98115911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8168164 + 3783025 = 2858^2 + 1945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11951189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₇₈₅₀₆₉ and since 11951189 and 785069 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 (11951179) 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, 5975594 + 5975595.

It is an arithmetic number, because the mean of its divisors is an integer number (5975595).

Almost surely, 2^11951189 is an apocalyptic number.

It is an amenable number.

11951189 is a deficient number, since it is larger than the sum of its proper divisors (1).

11951189 is an equidigital number, since it uses as much as digits as its factorization.

11951189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 35.

The square root of 11951189 is about 3457.0491752360. The cubic root of 11951189 is about 228.6320119728.

The spelling of 11951189 in words is "eleven million, nine hundred fifty-one thousand, one hundred eighty-nine".