11817019 has 2 divisors, whose sum is σ = 11817020. Its totient is φ = 11817018.

The previous prime is 11816999. The next prime is 11817053. The reversal of 11817019 is 91071811.

It is a weak prime.

It is an emirp because it is prime and its reverse (91071811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11817019 - 2²¹ = 9719867 is a prime.

It is a super-2 number, since 2×11817019² = 279283876092722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11817089) 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, 5908509 + 5908510.

It is an arithmetic number, because the mean of its divisors is an integer number (5908510).

Almost surely, 2^11817019 is an apocalyptic number.

11817019 is a deficient number, since it is larger than the sum of its proper divisors (1).

11817019 is an equidigital number, since it uses as much as digits as its factorization.

11817019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 28.

The square root of 11817019 is about 3437.5891261173. The cubic root of 11817019 is about 227.7732111892.

The spelling of 11817019 in words is "eleven million, eight hundred seventeen thousand, nineteen".