11819491 has 2 divisors, whose sum is σ = 11819492. Its totient is φ = 11819490.

The previous prime is 11819459. The next prime is 11819519. The reversal of 11819491 is 19491811.

It is a strong prime.

It is an emirp because it is prime and its reverse (19491811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11819491 - 2⁵ = 11819459 is a prime.

It is not a weakly prime, because it can be changed into another prime (11819891) 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, 5909745 + 5909746.

It is an arithmetic number, because the mean of its divisors is an integer number (5909746).

Almost surely, 2^11819491 is an apocalyptic number.

11819491 is a deficient number, since it is larger than the sum of its proper divisors (1).

11819491 is an equidigital number, since it uses as much as digits as its factorization.

11819491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 34.

The square root of 11819491 is about 3437.9486616295. The cubic root of 11819491 is about 227.7890926937.

The spelling of 11819491 in words is "eleven million, eight hundred nineteen thousand, four hundred ninety-one".