11900089 has 2 divisors, whose sum is σ = 11900090. Its totient is φ = 11900088.

The previous prime is 11900087. The next prime is 11900093. The reversal of 11900089 is 98000911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7868025 + 4032064 = 2805^2 + 2008^2 .

It is an emirp because it is prime and its reverse (98000911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11900089 - 2¹ = 11900087 is a prime.

It is a super-2 number, since 2×11900089² = 283224236415842, which contains 22 as substring.

Together with 11900087, it forms a pair of twin primes.

It is equal to p₇₈₁₉₁₂ and since 11900089 and 781912 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 (11900087) 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, 5950044 + 5950045.

It is an arithmetic number, because the mean of its divisors is an integer number (5950045).

Almost surely, 2^11900089 is an apocalyptic number.

It is an amenable number.

11900089 is a deficient number, since it is larger than the sum of its proper divisors (1).

11900089 is an equidigital number, since it uses as much as digits as its factorization.

11900089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 11900089 is about 3449.6505620135. The cubic root of 11900089 is about 228.3056905579.

The spelling of 11900089 in words is "eleven million, nine hundred thousand, eighty-nine".