11911019 has 2 divisors, whose sum is σ = 11911020. Its totient is φ = 11911018.

The previous prime is 11911013. The next prime is 11911027. The reversal of 11911019 is 91011911.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (91011911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11911019 - 2⁸ = 11910763 is a prime.

It is a super-2 number, since 2×11911019² = 283744747236722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11910985 and 11911003.

It is not a weakly prime, because it can be changed into another prime (11911013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5955509 + 5955510.

It is an arithmetic number, because the mean of its divisors is an integer number (5955510).

Almost surely, 2^11911019 is an apocalyptic number.

11911019 is a deficient number, since it is larger than the sum of its proper divisors (1).

11911019 is an equidigital number, since it uses as much as digits as its factorization.

11911019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 23.

The square root of 11911019 is about 3451.2344168428. The cubic root of 11911019 is about 228.3755672790.

The spelling of 11911019 in words is "eleven million, nine hundred eleven thousand, nineteen".