19191059 has 2 divisors, whose sum is σ = 19191060. Its totient is φ = 19191058.

The previous prime is 19191047. The next prime is 19191061. The reversal of 19191059 is 95019191.

It is a strong prime.

It is an emirp because it is prime and its reverse (95019191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19191059 - 2¹⁶ = 19125523 is a prime.

It is a Sophie Germain prime.

Together with 19191061, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19191559) 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, 9595529 + 9595530.

It is an arithmetic number, because the mean of its divisors is an integer number (9595530).

Almost surely, 2^19191059 is an apocalyptic number.

19191059 is a deficient number, since it is larger than the sum of its proper divisors (1).

19191059 is an equidigital number, since it uses as much as digits as its factorization.

19191059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3645, while the sum is 35.

The square root of 19191059 is about 4380.7600938650. The cubic root of 19191059 is about 267.7316083014.

The spelling of 19191059 in words is "nineteen million, one hundred ninety-one thousand, fifty-nine".